Shim, Young-Seok Moon, Hi Gyu Kim, Do Hong Zhang, Lihua Yoon, Seok-Jin Yoon, Young Soo Kang, Chong-Yun Jang, Ho Won 2024-01-20T12:02:46Z 2024-01-20T12:02:46Z 2021-09-05 2013-07 2046-2069 https://pubs.kist.re.kr/handle/201004/127911 Au-decorated WO3 cross-linked nanodomes are fabricated using soft templates composed of highly ordered polystyrene beads and self-agglomeration of Au. The distribution and size of Au nanoparticles on the surface of WO3 cross-linked nanodomes are controlled by varying the thickness of the initial Au film. The responses of Au-decorated WO3 cross-linked nanodomes to various gases such as NO2, CH3COCH3, C2H5OH, NH3, CO, H-2, and C6H6 are at least 5 times higher than those of bare WO3 cross-linked nanodomes. The response enhancement by Au decoration is dependent on the target gas, which is attributed to an interplay between electronic and chemical sensitizations. In particular, the Au-decorated WO3 cross-linked nanodomes exhibit extremely high sensitivities and selectivities, and ppt-level detection limits to NO2 and C2H5OH at 250 degrees C and 450 degrees C, respectively. These results suggest that Au-decorated WO3 cross-linked nanodomes are very promising for use in breath analysers to diagnose both asthma and lung cancer from exhaled human breath. English ROYAL SOC CHEMISTRY SEMICONDUCTOR GAS SENSORS SURFACE-CHEMISTRY ELECTRONIC NOSE EXHALED BREATH LUNG-CANCER THIN-FILMS GOLD CATALYSIS NANORODS CLUSTERS Au-decorated WO3 cross-linked nanodomes for ultrahigh sensitive and selective sensing of NO2 and C2H5OH Article 10.1039/c3ra41331d 1 RSC ADVANCES, v.3, no.26, pp.10452 - 10459 RSC ADVANCES 3 26 10452 10459 scie scopus 000320121500053 2-s2.0-84881450828 Chemistry, Multidisciplinary Chemistry Article SEMICONDUCTOR GAS SENSORS SURFACE-CHEMISTRY ELECTRONIC NOSE EXHALED BREATH LUNG-CANCER THIN-FILMS GOLD CATALYSIS NANORODS CLUSTERS