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MARIELA BRAVO-SANCHEZ
https://nanohub.org/members/183571
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Mark Ratner Interview on Nanotechnology
23 Mar 2006 | | Contributor(s):: Mark Ratner, Krishna Madhavan
Nanotechnology interview with Krishna Madhavan.
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MATLAB Scripts for "Quantum Transport: Atom to Transistor"
15 Mar 2005 | | Contributor(s):: Supriyo Datta
Tinker with quantum transport models! Download the MATLAB scripts used to demonstrate the physics described in Supriyo Datta's book Quantum Transport: Atom to Transistor. These simple models are less than a page of code, and yet they reproduce much of the fundamental physics observed in...
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MCW07 A Quantum Open Systems Approach to Molecular-Scale Devices
25 Feb 2008 | | Contributor(s):: Yongqiang Xue
Experimental advances in electrically and optically probing individual molecules have provided new insights into the behavior of single quantum objects and their interaction with the nanoenvironments without requiring ensemble average. Molecular-scale devices are open quantum systems whose...
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MCW07 Conductance Switching in Fluorene/TiO2 Molecular Heterojunctions
13 Sep 2007 | | Contributor(s):: Richard L.McCreery
Molecular junctions consisting of a monolayer of fluorene and 10 nm of TiO2 between conducting contacts exhibit a memory effect upon positive polarization of the of the TiO2 for a few milliseconds. The junction conductance increases for a period of several minutes, but can be “erased” by a...
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MCW07 Electronic Level Alignment at Metal-Molecule Contacts with a GW Approach
05 Sep 2007 | | Contributor(s):: Jeffrey B. Neaton
Most recent theoretical studies of electron transport in single-molecule junctions rely on a Landauer approach, simplified to treat electron-electron interactions at a mean-field level within density functional theory (DFT). While this framework has proven relatively accurate for certain systems,...
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MCW07 Exploring Trends in Conductance for Well-Defined Single Molecule Circuits
04 Apr 2009 | | Contributor(s):: Mark S Hybertsen
In our recent research, we have been able to measure and characterize the impact of intrinsic molecular properties on the conductance of single molecule circuits formed with amine-gold linkages. In this talk, I will review the experiments and the physical picture of the junction based on the...
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MCW07 Impact of Porphyrin Functional Groups on InAs Gas Sensors
05 Nov 2007 | | Contributor(s):: Michael Garcia
Porphyrin molecules are often used for sensor engineering to improve sensitivity and selectivity to specific analytes. It is important to understand how the porphyrin HOMO-LUMO levels deplete surface states during functionalization of solid state sensors. Additionally, the effect of...
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MCW07 Modeling Charging-based Switching in Molecular Transport Junctions
23 Aug 2007 | | Contributor(s):: Sina Yeganeh, Misha Galperin, Mark Ratner
We will discuss several proposed explanations for the switching and negative differential resistance behavior seen in some molecular junctions. It is shown that a proposed polaron model is successful in predicting both hysteresis and NDR behavior, and the model is elaborated with image charge...
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MCW07 Modeling Molecule-Assisted Transport in Nanotransistors
06 Nov 2007 | | Contributor(s):: Kamil Walczak
Molecular electronics faces many problems in practical device implementation, due to difficulties with fabrication and gate-ability. In these devices, molecules act as the main conducting channel. One could imagine alternate device structures where molecules act as quantum dots rather than...
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MCW07 Molecular Electronics and the Bottom-up View of Electronic Conduction
12 Sep 2007 | | Contributor(s):: Supriyo Datta
Molecular electronics is commonly associated with the bottom-up approach to nanofabrication. My objective in this talk is to point out how it also leads to a bottom-up view of electronic conduction completely different from the standard top-down approach that starts from large conductors and...
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MCW07 Physics of Contact Induced Current Asymmetry in Transport Through Molecules
25 Feb 2008 | | Contributor(s):: Bhaskaran Muralidharan, owen miller, Neeti Kapur, Avik Ghosh, Supriyo Datta
We first outline the qualitatively different physics involved in the charging-induced current asymmetries in molecular conductors operating in the strongly coupled (weakly interacting) self-consistent field (SCF) and the weakly coupled (strongly interacting) Coulomb Blockade (CB) regimes. The CB...
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MCW07 Silicon Based Nanopore Sensors for Detection of DNA Molecules
11 Sep 2007 | | Contributor(s):: Samir Iqbal, Demir Akin, Rashid Bashir
Solid-state nanopores have emerged as possible candidates for next-generation DNA sequencing devices. In this talk, we will review our recent work in development of solid-state nanopore channels that are selective towards single strand DNA (ssDNA). Nanopores functionalized with a 'probe' of...
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MCW07 Simple Models for Molecular Transport Junctions
13 Sep 2007 | | Contributor(s):: Misha Galperin, Abraham Nitzan, Mark Ratner
We review our recent research on role of interactions in molecular transport junctions. We consider simple models within nonequilibrium Green function approach (NEGF) in steady-state regime.
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Measurement of Single Molecule Conductance using STM-Based Break Junctions
28 Jul 2005 | | Contributor(s):: Nongjian Tao
We have measured single molecule conductance using a combined STM- and conducting AFM-based break junction method. The method works in aqueous solutions, which is suitable for biologically relevant molecules such as DNA and peptides, and also allows us to control electron transport through redox...
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Measuring Molecular Conductance: A Review of Experimental Approaches
09 Jul 2003 | | Contributor(s):: Ron Reifenberger
Measuring Molecular Conductance: A Review of Experimental Approaches
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Mechanical Properties of Surfactant Aggregates at Water-Solid Interfaces
05 Apr 2006 | | Contributor(s):: Patrick Chiu, Kunal Shah, Susan Sinnott
This is a talk on the mechanical properties of surfactant aggregates at water-solid interfaces using Micelle-MD. This includes silica indentations of micelles with comparison to experimental data and graphite indentation of Micelle.
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Michele Visciarelli
'''7/2004''': Maturità scientifica (High School Degree) from "Liceo Scientifico Gregorio RIcci Curbastro", Lugo (RA).'''12/2007''': Bachelors Degree in Electrical Engineering from "Alma Mater...
https://nanohub.org/members/68352
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MolCToy
08 Jun 2005 | | Contributor(s):: Magnus Paulsson, Ferdows Zahid, Supriyo Datta, Michael McLennan
Computes current-voltage (I-V) characteristics and conductance spectrum (G-V) of a molecule sandwiched between two metallic contacts
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Molecular Electronics Pathway for Molecular Memory Devices
06 Feb 2004 | | Contributor(s):: Ranganathan Shashidhar
We have been developing a scale molecular electronic device using a 30 nm sized plant virus particle as the scaffold. This talk describes the bioengineering aspects of how the virus particle is converted to a molecular electronic circuit and its electrical characterization. The talk describes...