There are no events scheduled at this time.

There are no events scheduled at this time.

1. Office of Educational Programs Event

   8:30 am, Berkner Hall Auditorium

   Hosted by: Noel Blackburn

2. Condensed-Matter Physics & Materials Science Seminar

   11 am, Bldg. 480 conference room

   Hosted by: Yimei Zhu

   Extensive theoretical and experimental studies show that charge, spin and lattice in CMR materials are strongly coupled one another and the interplay among these degrees of freedoms creates a complex phase diagram with multiple competing phases. However, there has been very few report on the direct observation of photoinduced structure phase transition, especially the ones related to local Jahn-Teller lattice distortion, in colossal magnetoresistive materials. The first part of this talk will present a direct and real time measurement of photoinduced structure phase transition in single crystal La0.84Sr0.16MnO3 using ultrafast electron diffraction (UED). The melting of orthorhombic lattice ordering under femtosecond optical excitation will be shown to involve two distinct processes with different time scales, an initial fast melting of orthorhombic phase in about 4 ps and a subsequent much slower transformation in 50 ps and longer timescales. The second part of talk will show recent work to solve two problems crucial to UED measurement in strongly correlated system. One is to attenuate Transient Electric field accompanying other targeted laser-triggered processes, and the other is to fabricate an electron-transparent single crystal sample in a large area, which is crucial in UED measurement due to its large electron beam size.

3. Technology Commercialization and Partnerships Workshop

   12 pm, Brookhaven Center

   So you've decided to start a business, you have had a great idea or you have discovered a new technology. Great! But how will you make the money? Join us for this hands-on workshop and take the next step in your business development journey!

1. Hospitality Coffee & Social

   10:30 am, Recreation Hall, Bldg. 317

   Hosted by: QOL/BERA/Recreation

2. Condensed-Matter Physics & Materials Science Seminar

   4 pm, Bldg. 480 conference room

   Hosted by: Yimei Zhu

   Novel ferroelectric materials including ferroelectric/dielectric superlattices provide additional means to modify the electronic and structural properties. These functional properties are closely linked to the response of the spontaneous polarization to external stimuli. Insight into the coupling of the polarization to other degrees of freedom can be inferred from the dynamics of ferroelectrics under electric field and optical excitations. We have studied the switching mechanism of polarization domains at a nanosecond timescale in ferroelectric/dielectric PbTiO3/SrTiO3 superlattices using time-resolved xray microdiffraction. In a superlattice with weakly-coupled component layers, the competition between the energy associated with the depolarization field and the energy of domain walls leads to the formation of striped domains. The dielectric layers are polarized with a weaker polarization than the ferroelectric layers. The striped domains and the non-equal distribution of the polarization have important consequences in the response of the superlattice to applied electric fields. We found that the switching of the striped domains occurs heterogeneously over the areas under applied electric fields, with a nanosecond timescale. Each component layer, however, responses different to applied electric fields. The dielectric SrTiO3 layers are less stable and show larger distortion of domains than the ferroelectric PbTiO3 layers at the early-time regime of switching. A larger piezoelectric expansion in the SrTiO3 layers is found at the late-time regime, commensurate with polarization change due to the elimination of striped domains. We have also studied the dynamics of structural modification in multiferroic BiFeO3 thin films under above-bandgap femtosecond optical excitation. Understanding the

1. PLAY GROUP ~ BERA/Recreation

   10 am, Recreation Hall, Bldg. 317

   Hosted by: QOL/BERA/Recreation

   Please sign up for the BNL Play Group at www.Meetup.com

2. National Synchrotron Light Source Seminar

   12 pm, Biosciences Seminar Room, Bldg. 463

   Hosted by: Diane DiMasi

   I will describe our recent efforts in using Next-Generation sequencing (RNA-Seq) methods in the context of biomimetic materials engineering. I will discuss how RNA-Seq, integrated with proteomics, offers an ideal platform that dramatically facilitates biomimetics research including the identification of novel biomaterials engineering designs and manufacturing processes. Combined with vibrational spectroscopy, x-ray scattering, and nano-mechanical characterization, I will describe how this approach allows for the rapid creation of genotype to mechanical phenotype maps in the context of bio-inspired materials engineering. I will specifically illustrate our efforts in deploying this approach towards giant squid Sucker Ring Teeth (SRT). SRT that line up the tentacles of giants squids are remarkable protein-based materials that can compete with the best synthetic polymers in terms of structural properties, with elastic modulus in the range of 8 GPa. Despite this high mechanical performance, inter-chain chemical cross-linking is absent and the teeth are fully stabilized by a network of hydrogen bond and hydrophobic interactions between the proteins building blocks. We have recently elucidated the molecular sequences and design of all major proteins that make up this remarkable supramolecular network. The proteins are highly repetitive and do not have any homology with commonly-known structural proteins, making them a unique and novel source of bio-inspiration biopolymer. We have also established a recombinant expression system that allows us to readily express full-length sucker ring teeth proteins in lab-scale quantities. The recombinant proteins are readily processed into a variety of structures and shapes, including fibers, films, or nano-patterned surfaces. Remarkably, the mechanical properties obtained from the recombinant match those from the native systems, thus opening the door to "green" manufacturing of novel biocompatible and robust biopolyme

1. Condensed-Matter Physics & Materials Science Seminar

   1:30 pm, Small Seminar Room, Bldg. 510

   Hosted by: Robert Konik

   Using Ferromagnetic Fermi liquid (FFL) theory, Bedell and Blagoev derived the collective low-energy excitations of a weak ferromagnet. They obtained the well-known magnon (Nambu-Goldstone) mode and found a new gapped mode that was never studied in weak ferromagnetic metals. Recently we have identified this mode as the Higgs boson (amplitude mode) of a ferromagnetic metal. This is identified as the Higgs since it can be show that it corresponds to a fluctuation of the amplitude of the order parameter. We use the FFL theory to describe the single particle and collective excitations of the itinerant-electron ferromagnetic material MnSi. By fitting the model with the existing experimental results, we calculate the dynamical structure function and see well-defined peaks contributed from the magnon and the Higgs. Our estimates of the relative intensity of the Higgs amplitude mode suggest that it can be seen in neutron scattering experiments on MnSi.

2. Joint High Energy Physics/Instrumentation Seminar

   3 pm, Small Seminar Room, Bldg. 510

   Hosted by: Tom Ludlam

   Existing or soon to be approved Dark Matter experiments are well designed for heavy WIMP masses larger than 6-7 GeV/c^2. They are not so well designed for light Dark Matter particle masses approaching ~ 1GeV/c^2. We will discuss several Dark Matter detectors with the smallest possible detection-reach equivalent to either a single electron or a single photon of a few eV energy. One option for such a detector, a spherical TPC, could be used to detect Dark Matter particles recoiling from a low mass nucleus such as hydrogen located in ethane molecule. This TPC would be equipped with charge amplification and light detection. Another detector candidate would have a large number of single photon sensitive PMTs, with its volume filled with water. This detector would be detect a Dark Matter particle candidate interacting with atom's electron shell via small electric dipole moment, and producing single photons. In this particular case we will discuss a possibility that such candidate is so called "small hydrogen atom", a long-forgotten subject in physics, but hotly discussed in 1920's. We will discuss a theoretical hint why such objects could exist, searches in the astrophysics, efforts to find such atoms in the lab in past and future.

3. Office of Educational Programs Event

   6 pm, Berkner Hall Auditorium

   Hosted by: Mel Morris

1. Instrumentation Division Seminar

   10:30 am, Large Conference Room, Bldg. 535

2. National Synchrotron Light Source Lunch Time Seminar

   12 pm, Seminar Room, Bldg. 725

   Hosted by: Dario Arena and Klaus Attenkofer

3. ASAP Cross Talks: Presentation Series

   5 pm, Brookhaven Center

   Hosted by: BNL ASAP

   Come grab a drink at the Brookhaven Center Happy Hour and listen to your colleagues talk about their research at BNL! Location: Brookhaven Center, South Room Evaluation of a novel wide size range fast integrated mobility spectrometer by Michail Pikridas Supervisor: Jian Wang A novel instrument, referred to as the wide size range fast integrated mobility spectrometer (WSR-FIMS), that is capable of measuring aerosol distributions at the nanometer size with high frequency, has been developed and evaluated. The WSR-FIMS sizes particles based on their electrical mobility by applying a non-uniform electric field between two parallel plates. All particles, regardless of their mobility, are simultaneously detected by a fast charge-coupled camera after being grown into super-micrometer droplets and illuminated by a laser sheet. The detected aerosol distribution is a function of the voltage range applied during the separation process. By eliminating the need to scan over the detected distribution the WSR-FIMS' time resolution is dictated only by counting statistics and can be as high as 0.1 s under high concentration or 1 s under most ambient conditions. The high sheath to aerosol flow ratio, 50 under typical conditions, ensures a satisfactory size resolution. Particle losses, which have been characterized, mainly occur at the instrument's inlet during conditioning. Because WSR-FIMS combines high time resolution data with single particle counting is suitable for fast changing aerosol processes such as tailpipe emission or mobile (ground or airborne) monitoring. EMPIRE: a nuclear reaction model code for nuclear astrophysics, nuclear data and nuclear physics by Annalia Palumbo Supervisor: Michal Herman EMPIRE is a nuclear reaction model code whose nuclear physics inputs are mainly taken from the RIPL-3 database

There are no events scheduled at this time.

There are no events scheduled at this time.

1. Office of Educational Programs Event

   8:30 am, Office of Educational Programs Bldg

   Hosted by: Catherine Osiecki

2. Condensed-Matter Physics & Materials Science Seminar

   11 am, Small Seminar Room, Bldg. 510

   Hosted by: John Tranquada

   In studying modern functional materials, one is often confronted with complex spin configurations, for example, non-collinear, incommensurate magnetic structure such as helimagnetic structure as a result of frustrated magnetic interactions. Since the giant functional responses in these materials are direct consequences of these complicated magnetic structures, the detailed knowledge of the structure is mandatory to understand the essence of the magnetic functional materials. In this seminar talk I would like to present some polarized neutron studies on magneto-electric materials with complex magnetic structures. These include investigations on complex multiferroic behaviour in RMn2O5 (R: rare earth elements) compounds, on ferroelectricity induced by a proper screw-type helical ordering in CuFeO2 and on transverse conical structure in hexaferrites showing a route to the possible RT functional multiferroic systems. These invetigations were performed in collaboration with S. Wakimoto, M. Matsuda, M. Takeda, Quantum Beam Science Directorate, Japan Atomic Energy Agency, Japan, N. Terada, H. Kitazawa, National Institute for Materials Science, Tsukuba, Japan, , T. Nakajima, S. Mitsuda, Dep. of Physics, Tokyo University of Science, Japan, S. Ishiwata, D. Okuyama, Y. Taguchi, Y. Tokunaga, Y. Kaneko, Y. Tokura, Cross-Correlated Materials Research Group and Correlated Electron Research Group, RIKEN, Japan, M. Nishi, Institute for Solid State Physics, University of Tokyo, Japan and T. Arima, Department of Advanced Materials Science, University of Tokyo, Japan. The neutron scattering studies were in part supported by the MEXT Grant-in-Aid for Scientific Research on Priority Areas (Grant No.19052004).

3. Sustainable Energy Technologies Seminar

   1:30 pm, Building 815 - Conference Room 1-37

   Hosted by: Feng Wang - 631-344-4388

   Rational Interfacial Design for Safer Lithium Ion Batteries Zonghai Chen Chemical Sciences and Engineering Division, Argonne National Laboratory 9700 South Cass Avenue, Argonne, IL, 60439, USA Recently, lithium-ion batteries have been proposed as the power sources for hybrid electric vehicles (HEVs). The commercialization of lithium-ion technology for automobile applications has been slow because of its insufficient calendar life, low abuse tolerance, high cost and poor low temperature performance. Major effort has been devoted to optimizing the structure and formulation of battery components to improve their electrochemical performance. Although it is well known that side reactions between electrode materials and electrolytes play major role in the capacity/power fade of lithium ion batteries, the importance of surface chemistry on battery safety has not been studied thoroughly. It will be shown that the surface chemistry can play a crucial role in the safety of both the anode and the cathode. On the anode side, a thermally-stable, artificial, solid electrolyte interphase (SEI) layer is the key to improve the safety characteristics of the battery system. On the other hand, a safer cathode material can be achieved by designing a protection outer layer to suppress the reactions between the cathode materials and the non-aqueous electrolyte. Acknowledgment Research at Argonne National Laboratory was funded by U.S. Department of Energy, Vehicle Technologies Office. Argonne National Laboratory is operated for the U.S. Department of Energy by UChicago Argonne, LLC, under contract DE-AC02-06CH11357.

1. Hospitality Coffee & Social

   10:30 am, Recreation Hall, Bldg. 317

   Hosted by: QOL/BERA/Recreation

2. Condensed-Matter Physics & Materials Science Seminar

   1:30 pm, Small Seminar Room, Bldg. 510

   Hosted by: John Tranquada

   For the emergence of superconductivity in the electron-doped cuprate oxide, both substitution of cation such as Ce4+ at a rear-earth (R) site and annealing procedure under oxygen reduction condition are required. Although the magnetism is recognized to play a key role in the mechanism of superconductivity, the effects of oxygen-reduction and Ce-doping on the spin correlation are not fully understood. In order to extract above two effects on the magnetism, we carried out high-energy inelastic neutron scattering measurements on the as-grown and the Ar-annealed Pr1.40La0.60CuO4-, and as-grown Pr1.32La0.60Ce0.08CuO4. All samples exhibit long-range antiferromagnetic (AF) order at low temperature. The dynamic spin response below ~300 meV throughout the first Brillouin zone was successfully determined. The dispersion relations in both as-grown and annealed Pr1.40La0.60CuO4 are reproduced by the two-dimensional spin-wave relation with the nearest neighbor exchange coupling J of 140±3 meV. However, in the as-grown mother compound, the absolute value of the neutron scattering intensity over the energy range determined in the present study is smaller than that in T-La2CuO4 and ~60% of total inelastic intensity below 250 meV is suppressed by annealing. On the other hand, the zone boundary energy becomes larger by Ce-doping, while the intensity dose not change so much. The origin of anomalous reduction of intensity after annealing is discussed in terms of change in the spin density cloud in the real space.

3. Weight Room Orientation & Workout Assistance for Members

   5 pm, Weight Room Bldg. 461

   Twice monthly assitance and orientation from 5-7pm in the Weight Room.

1. Long Island Green Infrastructure Conference

   8 am, Berkner Hall Auditorium

   Hosted by: Sherry Johnson

   Conference will facilitiate use of green technologies to manage water quality and energy issues by municipalities, private developers, and the general public.

2. PLAY GROUP ~ BERA/Recreaton

   10:15 am, Recreation Hall, Bldg. 317

   Hosted by: QOL/BERA/Recreation

   Please join BNL Play Group at www.meetup.com

3. Environmental Sciences Department Seminar

   11 am, Conference Room, Bldg 815E

   Hosted by: Jian Wang

   Isoprene emitted by the biosphere is the largest biogenic portion of the global budget of volatile organic compounds (VOC). Isoprene in the atmosphere is predominantly oxidized by the hydroxyl radical (OH). The oxidation of VOCs in the atmosphere contributes to the creation of ozone and secondary organic aerosol (SOA). Recent theoretical predictions and measurements have shown that small carbonyl compounds such as glyoxal, methyl glyoxal, hydroxyacetone and glycolaldehyde may be produced as co-product pairs from rapid isomerization of peroxy radicals in the first generation of isoprene oxidation. We investigated the temperature (260K, 298K and 330K) and NOx (near-zero NOx and high NOx (ppm level)) dependence of the first generation product yields from these isomerization pathways, and the implications of these findings on our understanding of the oxidation mechanism. Experiments combine the atmospheric simulation chamber at the National Center for Atmospheric Research with the CU Light Emitting Diode Cavity Enhanced Differential Optical Absorption Spectroscopy (CU LED-CE-DOAS) for the detection of glyoxal and methyl glyoxal; as well as Proton Transfer Reaction Mass Spectrometry for the detection of other isoprene oxidation products.

4. Condensed-Matter Physics & Materials Science Seminar

   11 am, Bldg. 480 conference room

   Hosted by: Ivan Bozovic

   When two plane wave X-ray beams of nearly equal amplitudes interfere coherently, an X-ray standing wave (XSW) field is generated. There are many ways of generation of coherently related plane waves for the generation of XSW, such as: (i) total external reflection from smooth surfaces of materials, (ii) Bragg diffraction in single crystals, (iii) Bragg diffraction from a periodic multilayer system etc. In all these cases the incident beam and the reflected beam are coherently coupled. The X-ray standing wave (XSW) technique is a powerful tool for accurate determination of the microscopic structure of surfaces and interfaces. It employs X-ray interference and X-ray scattering. The fringes of an X-ray interference field (XIF) can be spatially modulated in a controlled way. From the characteristic scattering response of the atoms within the range of interference field, spatial distribution of specific kinds of atoms can be determined. Atomic distributions are determined independently for each individual element present in the system. Sensitivity of the XSW technique is ∼ 1013 atoms/cm2 or better and positional resolution is 0.01 ˚A for single crystals and ∼ 1 ˚A for thin films and periodic multilayers under grazing incidence. As an element-sensitive high-resolution structural probe, the XSW technique has been used to investigate a wide range of surface, interface, and thin film structures. These include semiconductor, metal, and oxide surfaces; electrochemical interfaces; organic membranes; and multilayers. In this talk, I will present basic principles of the major types of XSW techniques and several important case studies.

5. Keynote Address - Long Island Green Infrastructure Conference & Expo

   12:15 pm, Berkner Hall Auditorium

   Enck will speak on the benefits of green infrastructure and the U.S. EPA programs that support green infrastructure initiatives. Lab employees may attend this portion of the conference at no cost. The rest of the conference and expo program requires a fee.

1. National Synchrotron Light Source Seminar

   11 am, Hamilton Seminar Room, Bldg. 555

   Hosted by: Aesook Byon

   In this presentation, I selected some relevant recent projects that I was directly responsible for. These efforts include Project Manager for the X17A Beamline at NSLS, development of the Equipment Information System for NSLS Mechanical Equipment, and a MORE risk assessment for all NSLS mechanical equipment (including two risk-minimization follow-up projects). Since I received no specific direction to assist in structuring my presentation, I selected some past projects that are relevant to the posted job requirements. If the interview committee wishes to provide further direction, I will be happy to accommodate their requests. Although I was involved with the development of other beamlines and beamline equipment, time limitations forced me choose only a small number of sample projects. Instead of picking additional beamline projects, I included some of my operational projects to add diversity, contrast, and depth that I hope the interview committee will find interesting. These other projects required the type of thinking for which academic training does not provide adequate preparation. Some of my projects and responsibilities at Grumman/Northrop Grumman were larger, more inventive, and involved more people. Many were also fast-paced so that new technologies could be introduced before competitors. Unfortunately these projects are less recent and many of the technical details cannot be discussed. The patents on my resume provide some details that are in the public domain. I am the chief inventor for most of them. Technical papers for many of these projects were never released externally due to non-disclosure agreements and/or classification restrictions.

2. EAP Lunchtime Talk

   12 pm, Berkner Hall, Room B

   Topics to be discussed include: Effects of negative patterns in relationship dynamics; Examine difficult relationship dynamics from Emotional Intelligence perspective; Managing or changing destructive patterns; and Identifying self-care techniques

3. National Synchrotron Light Source Seminar

   1 pm, Seminar Room, Bldg. 725

   Hosted by: Eric Dooryhee

   It is becoming apparent that nanoscale fluctuations in the charge state are important to the physics of transition metal oxides. The temperature evolution of structural modulation associated with charge (co) and spin order (so) in La1.67Sr0.33NiO4 has been investigated using neutron powder diffraction [1]. For the first time, we report an anomalous shrinking of the "a" lattice parameter that correlates with Tco, at the temperature where long-range stacking order of charge stripes disappears. In addition, we report anomalies in the mperature evolution of the refined atomic displacement parameters (ADP) and local structural parameters in the atomic pair distribution function (PDF), which show quite different temperature dependence consistent with the persistence of localized charges, presumably in the form of short range ordered dynamic charge stripe domains, over a broad temperature range above Tco. Similar effects are seen in LiRh2O4 where, at low temperature, the charges localize to form spin and structural dimers, which may be ordered or disordered [2]. Detailed temperature dependent xPDF measurements carried out at the recently constructed beamline, X17A-NSLS yield remarkable amount of information about the local dimer state of LiRh2O4. These were the first scientific data collected at X17A. Finally, I will present our recent demonstration that one can obtain quantitative PDFs from nanoparticles using a laboratory transmission electron microscope (TEM) [3]. This is a very exiting development for characterization of nanoparticles. Currently, we are developing this technique further to study thin films of transition metal oxides and other strongly correlated materials.

4. Condensed-Matter Physics & Materials Science Seminar

   1:30 pm, Small Seminar Room, Bldg. 510

   Hosted by: Peter Johnson

5. Environmental Sciences Department Seminar

   2:30 pm, Conference Room, Bldg 815E

   Direct numeric simulations (the approach adopted by current climate models) accumulate statistics by cumbersome numerical integrations and usually offer little insight into complex systems. Direct statistically approaches, on the other hand, directly predict the statistics. Along this line, we present a simple one-dimensional stochastic transport theory for complex three-dimensional medium. The heart of the theory is using a spatial autocorrelation function that encodes information about the spatial arrangement and morphology of the medium. Numerically, we show that the stochastic theory is able to faithfully reproduce various three-dimensional effects traditionally only captured by expensive three-dimensional simulations.

6. Community Advisory Council Meeting

   6:30 pm, Berkner Hall, Room B

   Hosted by: Sherry Johnson

1. Family Swim 10am-11am

   10 am, Swimming Pool Bldg 478 - Enter on Belll Ave. side.

   Families and their caregivers are welcomed to swim from 10am-11am

2. Environmental Sciences Department Seminar

   11 am, Conference Room, Bldg 815E

   Hosted by: Ernie Lewis

   Exoplanets are being discovered at an accelerating rate since 1995. Beginning with Jupiter-sized and larger planets, the gallery has enlarged to include super-Earths (1.5 to 2x the radius of Earth) and bodies smaller than Earth as well. There are no less than four different methods used to detect exoplanets, although the transit method, exemplified by the Kepler telescope in space, has bagged by far the largest number of detections. The watchword in exoplanet research has become "we can predict nothing" since many of the discoveries have defied traditional theories. Categories of exoplanets have been discovered that "should not" exist, for example hot Jupiters and planets around binary stars. This talk shall attempt to overview the methods used to detect exoplanets, a few of the important discoveries, and what lies ahead.


3. Brookhaven Veterans Association

   11 am, Berkner Lower Lobby

   Hosted by: Brookhaven Veterans Association

   Collection of worn flags that are no longer fit to serve as a symbol of our country.

4. National Synchrotron Light Source Lunch Time Seminar

   12 pm, Seminar Room, Bldg. 725

   Hosted by: Dario Arena & Klaus Attenkofer

5. Nuclear Physics & RIKEN Theory Seminar

   2 pm, Small Seminar Room, Bldg. 510

   Hosted by: Vladimir Skokov

   We propose a new approach for the calculation of the spectrum of excitations of QCD flux tubes. It relies on the fact that the worldsheet theory is integrable at low energies. The corresponding integrable model features a number of surprising properties characteristic for gravity rather than for conventional field theory. These include the absence of local off-shell observables, a minimal length, a maximum achievable (Hagedorn) temperature, as well as black hole precursors. It exhibits a new type of renormalization group flow behavior, "asymptotic fragility". With this approach, energy levels can be calculated for much shorter flux tubes than was previously possible, allowing for a quantitative comparison with existing lattice data. The improved theoretical control makes it manifest that existing lattice data provides strong evidence for a new pseudoscalar particle localized on the QCD fluxtube - the worldsheet axion.

There are no events scheduled at this time.

There are no events scheduled at this time.

There are no events scheduled at this time.

1. Final event before Summer Break: Hospitality Coffee & Social

   10:30 am, Recreation Hall, Bldg. 317

2. Center for Functional Nanomaterials Seminar

   11 am, Building 735, 2nd Floor Seminar Room

   Hosted by: Jurek Sadowski

   Coffee and cookies at 10:45 am Center for Functional Nanomaterials Colloquium Series Cooperative Function in Atomically Precise Nanoscale Assemblies Paul S. Weiss California NanoSystems Institute and Departments of Chemistry & Biochemistry and Materials Science & Engineering Department of Chemistry, UCLA, Los Angeles, CA Tuesday, June 18, 2013 11:00 am Bldg. 735 - Seminar Room, 2nd Floor We use molecular design, tailored syntheses, intermolecular interactions, and selective chemistry to direct molecules into desired positions to create nanostructures, to connect functional molecules to the outside world, and to serve as test structures for measuring single or bundled molecules. Interactions within and between molecules can be designed, directed, measured, understood, and exploited at unprecedented scales. Such interactions can be used to form precise molecular assemblies, nanostructures, and patterns, and to control and to stabilize function. We selectively test hypothesized mechanisms by varying molecular design, chemical environment, and measurement conditions to enable or to disable function and control using predictive and testable means. Critical to understanding these variations has been developing the means to make tens to hundreds of thousands of independent single-molecule measurements in order to develop sufficiently significant statistical distributions, while retaining the heterogeneity inherent in the measurements. We measure the electronic coupling of the molecules and substrates by measuring the polarizabilities of the connected functional molecules. The next step in such devices is to learn to assemble and to operate molecules together, both cooperatively and hierarchically, in analogy to biological muscles. We discuss our initial efforts in this area, in which we find both interfer

3. Financial Education Talk

   12 pm, Berkner Hall, Room B

   Join Craig Ferrantino of the Foundation for Personal Financial Education for a talk about assessing your investment profile, minimizing risk, and developing strategies for financial success. The talk will be held today, June 18, at noon in Berkner (Bldg. 488) Room B.

4. Health Promotion Program Event

   12 pm, Large Conference Room, Bldg. 490

   Hosted by: Michael Thorn

   Weight Watchers returns to BNL!! Stop by and hear about what the WW program has to offer! Its updated and ready to help you reach your goals!

5. Nonproliferation and National Security Seminar

   1:30 pm, Hamilton Seminar Room, Bldg. 555

   An overview of the material parameters of CdTe and (Cd,Zn)Te bulk crystals and their importance will be given. One of the targets is the specific behaviour of II-VI melts showing high ionicity and, thus, a tendency to structure, which affects the crystal quality markedly. After discussion of the crystal growth methods, especially THM, the next area of focus will be non-stoichiometry related growth defects, such as second-phase inclusions and precipitations affecting the detector response by carrier trapping. Near stoichiometric growth conditions, intrinsic/extrinsic point defect situation and annealing efficiency will be demonstrated. Finally, crystal twinning will be discussed.