Ordered porous RGO/SnO2 thin films for ultrasensitive humidity detection
Journal Article
·
· Journal of Materials Chemistry C
- Univ. of California, Berkeley, CA (United States); Univ. of Science and Technology of China, Hefei (China)
- Univ. of California, Berkeley, CA (United States)
- Univ. of California, Berkeley, CA (United States); Xi'an Jiaotong Univ., Shaanxi (China)
- Univ. of California, Berkeley, CA (United States); Northeastern University, Shenyang (China)
- TDK InvenSense Inc., San Jose, CA (United States)
- Stanford Univ., CA (United States)
- Univ. of Science and Technology of China, Hefei (China)
In this work, ordered porous thin films of reduced graphene oxide and tin oxide (rGO/SnO2) were synthesized by a polystyrene sphere monolayer colloidal crystal template method, and their gas-sensing properties were systematically studied. The formed amorphous SnO2 and partially reduced graphene oxide were analyzed using several complementary material characterization techniques. Further, the results show that the incorporation of rGO significantly improved the humidity sensitivity and the electrical conductivity of the sensor relative to the pristine SnO2 thin film. Fast response time and excellent selectivity towards humidity were also achieved for the rGO/SnO2 composite film. The long-term stability of the rGO/SnO2 sensor was confirmed by comparing its performance to a commercial humidity sensor. The enhanced sensor performance is attributed to the synergistic effects of the incorporation of rGO and the ordered porous structure of the composite film.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Molecular Foundry
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 2422849
- Alternate ID(s):
- OSTI ID: 1987446
- Journal Information:
- Journal of Materials Chemistry C, Journal Name: Journal of Materials Chemistry C Journal Issue: 28 Vol. 11; ISSN 2050-7526
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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