Tuesday, November 3, 2015, 11:00 am — CFN, Bldg. 735, conf. rm. A
Center for Functional Nanomaterials Seminar The complexity of simple chemistry; Development of in Operando SPM and the in situ oxidation of Pt(111) Matthijs A. van Spronsen Tuesday, November 3, 2015 11:00 am Bldg. 735 â€" Conf. Room A Matthijs A. van SpronsenÂ¹, Sander B. RoobolÂ¹, Joost W.M. FrenkenÂ¹, and Irene M.N. GrootÂ¹â»Â² Â¹Huygens-Kamerlingh Onnes Laboratory, Leiden University, Leiden, The Netherlands Â²Gorlaeus Laboratories, Leiden Institute of Chemistry, Leiden University, Leiden, The Netherlands One interesting property of nanomaterials is their enhanced chemical reactivity. This property is frequently employed in the chemical industry. In industrial reactions, metallic nanoparticles can serve as catalysts to enhance the reaction rate or improve selectivity. The catalyst's activity is influenced by the nanoscale arrangement of surface atoms. Understanding catalysis, therefore, requires precise knowledge of the surface structure of nanoparticles. The difficulty, however, is that these structures often change under reaction conditions. To investigate surfaces under reaction conditions, we have developed a small reactor flow cell that is integrated with a scanning probe microscope. This microscope can serve both as Scanning Tunneling Microscope (STM) and Atomic Force Microscope (AFM) and operate in conditions of up to 6 bar and 600 K. As AFM, also electrically insulating samples can be studied, e.g., oxide-supported nanoparticles. This talk will partially focus on the development of the ReactorAFM. The AFM uses a miniature quartz tuning fork as force sensor. The force is measured between the sample and a micro-sized tip, which is grown by electron-beam-induced deposition of Pt. The design of the instrument and the challenges of NC-AFM at high pressure and high temperature conditio
Hosted by: Anibal Boscoboinik
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