Can We Determine the Barrier Resistance for Electron Transport in Ligand Stabilized Nanoparticles from Integral Conductance Measurements?

1999 ◽  
Vol 581 ◽  
Author(s):  
U. Simon
Keyword(s):  
Activation Energy ◽  
Chemical Composition ◽  
Electron Transport ◽  
Charge Transport ◽  
Single Molecule ◽  
Temperature Dependent ◽  
Theoretical Methods ◽  
Particle Spacing ◽  
Barrier Resistance ◽  
Dense Packings

ABSTRACTBy means of integral temperature dependent conductance measurements, the effective capacitance of ligand stabilized nanoparticles, arranged in dense packings or networks, can be deduced from the activation energy of the charge transport, for which the use of the Landauer formula is proposed. According to this, the barrier resistance in ligand stabilized nanoparticle arrangements depends predominantly on the inter particle spacing rather than on the chemical composition of the molecules. Comparison with data of the single molecule resistance determined by local probe techniques or by theoretical methods shows remarkable aggreement.

Temperature dependent charge transport across tunnel junctions of single-molecules and self-assembled monolayers: a comparative study

2016 ◽  
Vol 45 (43) ◽  
pp. 17153-17159 ◽  
Author(s):  
Alvar R. Garrigues ◽  
Li Yuan ◽  
Lejia Wang ◽  
Simranjeet Singh ◽  
Enrique del Barco ◽  
...  
Keyword(s):  
Comparative Study ◽  
Charge Transport ◽  
Single Molecule ◽  
Tunnel Junctions ◽  
Temperature Behavior ◽  
Self Assembled Monolayers ◽  
Temperature Dependent ◽  
Self Assembled Monolayer ◽  
Assembled Monolayers ◽  
Self Assembled

In this work we present a comparative study of the temperature behavior of charge current in both single-molecule transistors and self-assembled monolayer-based tunnel junctions with ferrocene molecules.

scholarly journals Conformation-dependent charge transport through short peptides

Nanoscale ◽  
2021 ◽  
Author(s):  
Davide Stefani ◽  
Cunlan Guo ◽  
Luca Ornago ◽  
Damien Cabosart ◽  
Maria El Abbassi ◽  
...  
Keyword(s):  
Electron Transport ◽  
Charge Transport ◽  
Single Molecule ◽  
Short Peptides ◽  
Break Junction ◽  
Single Molecule Junctions

We report on charge transport across single short peptides using the Mechanically Controlled Break-Junction (MCBJ) method. We record thousands of electron transport events across single-molecule junctions and with an unsupervised...

scholarly journals Charge transport through extended molecular wires with strongly correlated electrons

2021 ◽  
Author(s):  
James O. Thomas ◽  
Jakub K. Sowa ◽  
Bart Limburg ◽  
Xinya Bian ◽  
Charalambos Evangeli ◽  
...  
Keyword(s):  
Electron Transport ◽  
Charge Transport ◽  
Experimental Studies ◽  
Strongly Correlated Electrons ◽  
Molecular Wires ◽  
Correlated Electrons ◽  
Strongly Correlated

Experimental studies of electron transport through an edge-fused porphyrin oligomer in a graphene junction are interpreted within a Hubbard dimer framework.

scholarly journals Mechanical single-molecule potentiometers with large switching factors from ortho-pentaphenylene foldamers

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Jinshi Li ◽  
Pingchuan Shen ◽  
Shijie Zhen ◽  
Chun Tang ◽  
Yiling Ye ◽  
...  
Keyword(s):  
Charge Transport ◽  
Single Molecule ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Helical Structures ◽  
Anchoring Groups ◽  
Molecular Conductance ◽  
And Control ◽  
Helical Molecules ◽  
Shed Light

AbstractMolecular potentiometers that can indicate displacement-conductance relationship, and predict and control molecular conductance are of significant importance but rarely developed. Herein, single-molecule potentiometers are designed based on ortho-pentaphenylene. The ortho-pentaphenylene derivatives with anchoring groups adopt multiple folded conformers and undergo conformational interconversion in solutions. Solvent-sensitive multiple conductance originating from different conformers is recorded by scanning tunneling microscopy break junction technique. These pseudo-elastic folded molecules can be stretched and compressed by mechanical force along with a variable conductance by up to two orders of magnitude, providing an impressively higher switching factor (114) than the reported values (ca. 1~25). The multichannel conductance governed by through-space and through-bond conducting pathways is rationalized as the charge transport mechanism for the folded ortho-pentaphenylene derivatives. These findings shed light on exploring robust single-molecule potentiometers based on helical structures, and are conducive to fundamental understanding of charge transport in higher-order helical molecules.

scholarly journals Quantum Algorithm for Simulating Single-Molecule Electron Transport

2021 ◽  
Vol 12 (4) ◽  
pp. 1256-1261
Author(s):  
Soran Jahangiri ◽  
Juan Miguel Arrazola ◽  
Alain Delgado
Keyword(s):  
Electron Transport ◽  
Single Molecule ◽  
Quantum Algorithm

Phosphindole fused pyrrolo[3,2-b]pyrroles: a new single-molecule junction for charge transport

2019 ◽  
Vol 48 (19) ◽  
pp. 6347-6352
Author(s):  
Di Wu ◽  
Jueting Zheng ◽  
Chenyong Xu ◽  
Dawei Kang ◽  
Wenjing Hong ◽  
...  
Keyword(s):  
Charge Transport ◽  
Single Molecule ◽  
High Thermostability ◽  
New Family ◽  
Luminescence Efficiency ◽  
Molecule Junction ◽  
Single Molecule Junction

A new family of phosphindole fused ladder-type heteroacenes with a pyrrolo[3,2-b]pyrrole core were synthesized and characterized, which show good luminescence efficiency, high thermostability and tunable conductance.

Temperature-dependent activation energy and variable range hopping in semi-insulating GaAs

2006 ◽  
Vol 21 (12) ◽  
pp. 1681-1685 ◽  
Author(s):  
R M Rubinger ◽  
G M Ribeiro ◽  
A G de Oliveira ◽  
H A Albuquerque ◽  
R L da Silva ◽  
...  
Keyword(s):  
Activation Energy ◽  
Variable Range Hopping ◽  
Temperature Dependent ◽  
Variable Range

Hydrogenation of methylacetylene. III. The reaction of methylacetylene with hydrogen catalyzed by nickel, copper, and their alloys

1968 ◽  
Vol 46 (4) ◽  
pp. 623-633 ◽  
Author(s):  
R. S. Mann ◽  
K. C. Khulbe
Keyword(s):  
Activation Energy ◽  
Nickel Catalyst ◽  
Hydrogen Pressure ◽  
Constant Volume ◽  
Temperature Dependent ◽  
Nickel Copper ◽  
Wide Range ◽  
Initial Hydrogen Pressure

The reaction between methylacetylene and hydrogen over unsupported nickel, copper, and their alloys has been investigated in a static constant volume system between 20 and 220 °C for a wide range of reactant ratios. The order of reaction with respect to hydrogen was one and nearly independent of temperature. While the order of reaction with respect to methylacetylene over nickel catalyst was slightly negative and temperature dependent, it was always positive and nearly independent of temperature for copper and copper-rich alloys. Selectivity was independent of initial hydrogen pressure for nickel and copper only; for others it decreased rapidly with increasing hydrogen pressure. The overall activation energy varied between 9 and 21.2 kcal/g mole. Selectivity and extent of polymerization increased with increasing amount of copper in the alloy.

Sign in / Sign up

Export Citation Format

Share Document