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Physically Flexible, Rapid‐Response Gas Sensor Based on Colloidal Quantum Dot Solids
Author(s) -
Liu Huan,
Li Min,
Voznyy Oleksandr,
Hu Long,
Fu Qiuyun,
Zhou Dongxiang,
Xia Zhe,
Sargent Edward H.,
Tang Jiang
Publication year - 2014
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201304366
Subject(s) - quantum dot , materials science , nanotechnology , substrate (aquarium) , colloid , computer science , chemistry , oceanography , geology
A gas sensor based on PbS colloidal quantum dots (CQDs) is constructed on a paper substrate, yielding flexible, rapid‐response NO 2 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 NO 2 with the PbS CQDs.