Single-Molecule Charge-Transport Measurements that Reveal Technique-Dependent Perturbations

2006 ◽  
Vol 128 (34) ◽  
pp. 11260-11267 ◽  
Author(s):  
Dwight S. Seferos ◽  
Amy Szuchmacher Blum ◽  
James G. Kushmerick ◽  
Guillermo C. Bazan
Keyword(s):  
Charge Transport ◽  
Single Molecule ◽  
Transport Measurements

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.

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.

Single-Molecule Charge Transport in Discrete, π-Stacked Pyridinium Dimers

2021 ◽  
Author(s):  
Hao Yu ◽  
Jialing Li ◽  
Songsong Li ◽  
Jeffrey S. Moore ◽  
Charles M. Schroeder
Keyword(s):  
Charge Transport ◽  
Single Molecule

Substitution Pattern Controlled Charge Transport in BN-Embedded Aromatics-Based Single-Molecule Junctions

2021 ◽  
Author(s):  
Hongxiang Li ◽  
Rui Wang ◽  
Kai Song ◽  
Caiyun Wei ◽  
Wenjing Hong ◽  
...  
Keyword(s):  
Charge Transport ◽  
Single Molecule ◽  
Molecular Devices ◽  
Substitution Pattern ◽  
Single Molecule Level ◽  
Single Molecule Junctions ◽  
Molecular Conductance

The understanding of charge transport at single-molecule level is a pre-requisite for the fabrication of molecular devices. Here, we systematically investigate the relation among molecular conductance, substitution pattern and stimuli...

scholarly journals Frontispiece: Tuning Charge Transport in Aromatic-Ring Single-Molecule Junctions via Ionic-Liquid Gating

2018 ◽  
Vol 57 (43) ◽  
Author(s):  
Na Xin ◽  
Xingxing Li ◽  
Chuancheng Jia ◽  
Yao Gong ◽  
Mingliang Li ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Charge Transport ◽  
Aromatic Ring ◽  
Single Molecule ◽  
Single Molecule Junctions

Determining plasmonic hot-carrier energy distributions via single-molecule transport measurements

Science ◽  
2020 ◽  
pp. eabb3457 ◽  
Author(s):  
Harsha Reddy ◽  
Kun Wang ◽  
Zhaxylyk Kudyshev ◽  
Linxiao Zhu ◽  
Shen Yan ◽  
...  
Keyword(s):  
Single Molecule ◽  
Plasmonic Nanostructures ◽  
Hot Carriers ◽  
Energy Distributions ◽  
Nanoscale Systems ◽  
Hot Carrier ◽  
Transport Measurements ◽  
Single Molecule Junctions ◽  
Molecule Transport ◽  
Carrier Energy

Hot-carriers in plasmonic nanostructures, generated via plasmon decay, play key roles in applications like photocatalysis and in photodetectors that circumvent band-gap limitations. However, direct experimental quantification of steady-state energy distributions of hot-carriers in nanostructures has so far been lacking. We present transport measurements from single-molecule junctions, created by trapping suitably chosen single molecules between an ultra-thin gold film supporting surface plasmon polaritons and a scanning probe tip, that can provide quantification of plasmonic hot-carrier distributions. Our results show that Landau damping is the dominant physical mechanism of hot-carrier generation in nanoscale systems with strong confinement. The technique developed in this work will enable quantification of plasmonic hot-carrier distributions in nanophotonic and plasmonic devices.

scholarly journals Molecular Transport Junctions: An Introduction

MRS Bulletin ◽  
2004 ◽  
Vol 29 (6) ◽  
pp. 376-384 ◽  
Author(s):  
Cherie R. Kagan ◽  
Mark A. Ratner
Keyword(s):  
Thin Film ◽  
Charge Transport ◽  
Single Molecule ◽  
Molecular Transport ◽  
Molecular Junction ◽  
Theoretical Understanding ◽  
Future Directions ◽  
Molecular Scale ◽  
Molecular Charge ◽  
Made In

AbstractThis issue of MRS Bulletin on molecular transport junctions highlights the current experimental and theoretical understanding of molecular charge transport and its extension to the rapidly growing areas of molecular and carbon nanotube electronics. This introduction will outline the progress that has been made in understanding the mechanisms of molecular junction transport and the challenges and future directions in exploring charge transport on the molecular scale. In spite of the substantial challenges, molecular charge transport is of great interest for its intrinsic importance to potential single-molecule electronic, thin-film electronic, and optoelectronic applications.

Charge Transport in Cu2S Nanocrystals Arrays: Effects of Crystallite Size and Ligand Length

2015 ◽  
Vol 229 (1-2) ◽  
Author(s):  
Yehonadav Bekenstein ◽  
Orian Elimelech ◽  
Kathy Vinokurov ◽  
Oded Millo ◽  
Uri Banin
Keyword(s):  
Charge Transport ◽  
Crystallite Size ◽  
Quantum Confinement ◽  
Confinement Effects ◽  
Transport Measurements ◽  
Quantum Confinement Effects

AbstractQuantum confinement effects are observed in transport measurements of Cu

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