Physically flexible, rapid-response gas sensor based on colloidal quantum dot solids.
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.
School of Optical and Electronic Information, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei, 430074, P. R. China.
Huan
H
Liu
Min
M
Li
Oleksandr
O
Voznyy
Long
L
Hu
Qiuyun
Q
Fu
Dongxiang
D
Zhou
Zhe
Z
Xia
Edward H
EH
Sargent
Jiang
J
Tang
D003102:Colloids / Q000737:chemistry*; D003217:Conductometry / Q000295:instrumentation*; D055119:Elastic Modulus; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005740:Gases / Q000032:analysis* / Q000737:chemistry; D007854:Lead / Q000737:chemistry; D036103:Nanotechnology / Q000295:instrumentation*; D009569:Nitric Oxide / Q000032:analysis* / Q000737:chemistry; D045663:Quantum Dots; D018036:Selenium Compounds / Q000737:chemistry; D012680:Sensitivity and Specificity; D014159:Transducers
D003102:Colloids; D005740:Gases; D018036:Selenium Compounds; C088065:lead selenide; D007854:Lead; D009569:Nitric Oxide
colloidal quantum dots; gas sensors; lead sulfide; nitrogen dioxide