Dithienylethene‐Based Single Molecular Photothermal Linear Actuator

Author:

Rashid Umar1ORCID,Chatir Elarbi2,Medrano Sandonas Leonardo3ORCID,Sreelakshmi PA1ORCID,Dianat Arezoo4,Gutierrez Rafael4,Cuniberti Gianaurelio45,Cobo Saioa2,Kaliginedi Veerabhadrarao1ORCID

Affiliation:

1. Department of Inorganic and Physical Chemistry (IPC) Indian Institute of Science (IISc) Bangalore 560012 India

2. Université Grenoble Alpes CNRS DCM UMR 5250 38000 Grenoble France

3. Department of Physics and Materials Science University of Luxembourg 1511 Luxembourg Luxembourg

4. Institute for Materials Science and Max Bergmann Center of Biomaterials Dresden University of Technology 01062 Dresden Germany

5. Dresden Center for Computational Materials Science and Center for Advancing Electronics Dresden University of Technology 01062 Dresden Germany

Abstract

AbstractBy employing a mechanically controllable break junction technique, we have realized an ideal single molecular linear actuator based on dithienylethene (DTE) based molecular architecture, which undergoes reversible photothermal isomerization when subjected to UV irradiation under ambient conditions. As a result, open form (compressed, UV OFF) and closed form (elongated, UV ON) of dithienylethene‐based molecular junctions are achieved. Interestingly, the mechanical actuation is achieved without changing the conductance of the molecular junction around the Fermi level over several cycles, which is an essential property required for an ideal single molecular actuator. Our study demonstrates a unique example of achieving a perfect balance between tunneling width and barrier height change upon photothermal isomerization, resulting in no change in conductance but a change in the molecular length, which results in mechanical actuation at the single molecular level.

Funder

Indian Institute of Science

Publisher

Wiley

Subject

General Medicine

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