PMID- 23579239
OWN - NLM
STAT- MEDLINE
DCOM- 20131216
LR  - 20130422
IS  - 1364-5528 (Electronic)
IS  - 0003-2654 (Linking)
VI  - 138
IP  - 10
DP  - 2013 May 21
TI  - Ultrasensitive thin film infrared sensors enabled by hybrid nanomaterials.
PG  - 3053-7
LID - 10.1039/c3an00106g [doi]
AB  - IR sensing is an important technology with applications in renewable energy, 
      environmental science and medical engineering. Herein environment-friendly IR 
      sensors based on the single-walled carbon nanotube-copper sulfide nanoparticle 
      (SWNT-CuS NP) hybrid nanomaterials are reported. The IR response in the 
      photocurrent of a SWNT-CuS NP hybrid thin-film sensor is significantly enhanced 
      when the IR light illuminates the thin-film device asymmetrically. We show that 
      the change of photocurrent is up to 300%, which is 10x to 100x larger than those 
      of other reported nanomaterial-based IR sensors. The detection limit can be as 
      low as 48 muW mm(-2), among the lowest of the previously reported IR nanosensors. 
      The dramatically enhanced sensitivity and detection limit are due to the 
      temperature difference between the two junctions formed by the nanohybrid thin 
      film and Cu-wire electrodes under asymmetric IR illumination, and the difference 
      between the effective Seebeck coefficient of the nanohybrid thin film and that of 
      the Cu wire. The IR sensor embedded in polydimethylsiloxane (PDMS) layers has 
      been fabricated and tested, indicating its potential application as a flexible IR 
      sensor.
FAU - Tseng, Yi-Hsuan
AU  - Tseng YH
AD  - Institute for Micromanufacturing, Louisiana Tech University, 71272, USA.
FAU - He, Yuan
AU  - He Y
FAU - Que, Long
AU  - Que L
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - England
TA  - Analyst
JT  - The Analyst
JID - 0372652
RN  - 0 (Nanotubes, Carbon)
RN  - 0 (Sulfides)
RN  - 789U1901C5 (Copper)
SB  - IM
MH  - Copper/*chemistry
MH  - Infrared Rays
MH  - Nanoparticles/*chemistry
MH  - Nanotubes, Carbon/*chemistry
MH  - Spectrophotometry, Infrared
MH  - Sulfides/*chemistry
EDAT- 2013/04/13 06:00
MHDA- 2013/12/18 06:00
CRDT- 2013/04/13 06:00
PHST- 2013/04/13 06:00 [entrez]
PHST- 2013/04/13 06:00 [pubmed]
PHST- 2013/12/18 06:00 [medline]
AID - 10.1039/c3an00106g [doi]
PST - ppublish
SO  - Analyst. 2013 May 21;138(10):3053-7. doi: 10.1039/c3an00106g.