Abstract
Graphene is one of the most promising materials for high-performance gas sensors due to its unique properties such as high sensitivity at room temperature, transparency, and flexibility. However, the low selectivity and irreversible behavior of graphene-based gas sensors are major problems. Here, we present unprecedented room temperature hydrogen detection by Au nanoclusters supported on self-activated graphene. Compared to pristine graphene sensors, the Au-decorated graphene sensors exhibit highly improved gas-sensing properties upon exposure to various gases. In particular, an unexpected substantial enhancement in H 2 detection is found, which has never been reported for Au decoration on any type of chemoresistive material. Density functional theory calculations reveal that Au nanoclusters on graphene contribute to the adsorption of H atoms, whereas the surfaces of Au and graphene do not bind with H atoms individually. The discovery of such a new functionality in the existing material platform holds the key to diverse research areas based on metal nanocluster/graphene heterostructures.
| Original language | English |
|---|---|
| Pages (from-to) | 2966-2973 |
| Number of pages | 8 |
| Journal | Nanoscale |
| Volume | 11 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2019 Feb 14 |
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ASJC Scopus subject areas
- Materials Science(all)
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Au decoration of a graphene microchannel for self-activated chemoresistive flexible gas sensors with substantially enhanced response to hydrogen. / Kim, Yeonhoo; Choi, Yong Seok; Park, Seo Yun; Kim, Taehoon; Hong, Seung Pyo; Lee, Tae Hyung; Moon, Cheon Woo; Lee, Jong Heun; Lee, Donghwa; Hong, Byung Hee; Jang, Ho Won.
In: Nanoscale, Vol. 11, No. 6, 14.02.2019, p. 2966-2973.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Au decoration of a graphene microchannel for self-activated chemoresistive flexible gas sensors with substantially enhanced response to hydrogen
AU - Kim, Yeonhoo
AU - Choi, Yong Seok
AU - Park, Seo Yun
AU - Kim, Taehoon
AU - Hong, Seung Pyo
AU - Lee, Tae Hyung
AU - Moon, Cheon Woo
AU - Lee, Jong Heun
AU - Lee, Donghwa
AU - Hong, Byung Hee
AU - Jang, Ho Won
PY - 2019/2/14
Y1 - 2019/2/14
N2 - Graphene is one of the most promising materials for high-performance gas sensors due to its unique properties such as high sensitivity at room temperature, transparency, and flexibility. However, the low selectivity and irreversible behavior of graphene-based gas sensors are major problems. Here, we present unprecedented room temperature hydrogen detection by Au nanoclusters supported on self-activated graphene. Compared to pristine graphene sensors, the Au-decorated graphene sensors exhibit highly improved gas-sensing properties upon exposure to various gases. In particular, an unexpected substantial enhancement in H 2 detection is found, which has never been reported for Au decoration on any type of chemoresistive material. Density functional theory calculations reveal that Au nanoclusters on graphene contribute to the adsorption of H atoms, whereas the surfaces of Au and graphene do not bind with H atoms individually. The discovery of such a new functionality in the existing material platform holds the key to diverse research areas based on metal nanocluster/graphene heterostructures.
AB - Graphene is one of the most promising materials for high-performance gas sensors due to its unique properties such as high sensitivity at room temperature, transparency, and flexibility. However, the low selectivity and irreversible behavior of graphene-based gas sensors are major problems. Here, we present unprecedented room temperature hydrogen detection by Au nanoclusters supported on self-activated graphene. Compared to pristine graphene sensors, the Au-decorated graphene sensors exhibit highly improved gas-sensing properties upon exposure to various gases. In particular, an unexpected substantial enhancement in H 2 detection is found, which has never been reported for Au decoration on any type of chemoresistive material. Density functional theory calculations reveal that Au nanoclusters on graphene contribute to the adsorption of H atoms, whereas the surfaces of Au and graphene do not bind with H atoms individually. The discovery of such a new functionality in the existing material platform holds the key to diverse research areas based on metal nanocluster/graphene heterostructures.
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U2 - 10.1039/c8nr09076a
DO - 10.1039/c8nr09076a
M3 - Article
VL - 11
SP - 2966
EP - 2973
JO - Nanoscale
JF - Nanoscale
SN - 2040-3364
IS - 6
ER -