Seminário do Departamento de Física dos Materiais e Mecânica
"Measuring and Controlling the Charge State of Molecules on Multilayer Insulating Films"
Dr. Shadi Fatayer
IBM Research - Zurich, Rueschlikon, Switzerland
Data: 16 de dezembro de 2016 (sexta-feira)
Horário: às 15h
Local: Sala de Seminários José Roberto Leite - Ed. Alessandro Volta (bloco C) - térreo
Abstract:
In the past two decades, experiments concerning few monolayer (ML) of insulating films revealed different physical properties of single adsorbates. Amongst them, charge state determination and control of Au adatoms (1) and charge distribution within a molecule (2). But in order to efficiently decouple the system of interest to the substrate, several nanometer thickness of the insulating film are required allowing higher charge state control of adsorbates (3). Here we present results concerning molecules and their charge state determination and control via atomic force microscopy and Kelvin probe force microscopy measurements on NaCl films ranging from 5 to 20 ML and demonstrate lateral single electron transfer between molecules (4).
References:
1. J. Repp et al. Controlling the charge state of individual gold adatoms. Science 305, 493 (2004);
2. F. Mohn et al. Imaging the charge distribution within a single molecule. Nature Nanotechnology 7, 227 (2012);
3. W. Steurer et al. Manipulation of the charge state of single Au atoms on insulating multilayer films. Physical Review Letters 114, 036801 (2015);
4. W. Steurer and S. Fatayer et al. Probe-based measurements of lateral single-electron transfer between individual molecules. Nature Communications 114, 036801 (2015).
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Information:
Secretary: Rosana Batista Gimenes Biz
Fone: (55)(11)3091-6979
