基于胶体量子点固体的物理灵活、快速响应气体传感器。

Physically flexible, rapid-response gas sensor based on colloidal quantum dot solids.

机构信息

School of Optical and Electronic Information, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei, 430074, P. R. China.

出版信息

Adv Mater. 2014 May;26(17):2718-24, 2617. doi: 10.1002/adma.201304366. Epub 2014 Jan 22.

DOI:10.1002/adma.201304366

PMID:24452852

Abstract

A gas sensor based on PbS colloidal quantum dots (CQDs) is constructed on a paper substrate, yielding flexible, rapid-response NO₂ gas sensors, fabricated from the solution phase. The devices are highly sensitive and fully recoverable at room temperature, which is attributed to the excellent access of gas molecules to the CQD surface, realized by surface ligand removal, combined with the desirable binding energy of NO₂ with the PbS CQDs.

摘要

基于 PbS 胶体量子点 (CQDs) 的气体传感器构建在纸张衬底上，得到了由溶液相制备的柔性、快速响应的 NO₂气体传感器。这些器件在室温下具有很高的灵敏度和完全可恢复性，这归因于表面配体的去除，以及 PbS CQDs 与 NO₂ 之间理想的结合能，使得气体分子能够极好地接触到 CQD 表面。