Moon, Hi Gyu Shim, Young-Soek Kim, Do Hong Jeong, Hu Young Jeong, Myoungho Jung, Joo Young Han, Seung Min Kim, Jong Kyu Kim, Jin-Sang Park, Hyung-Ho Lee, Jong-Heun Tuller, Harry L. Yoon, Seok-Jin Jang, Ho Won 2024-01-20T14:04:07Z 2024-01-20T14:04:07Z 2022-01-10 2012-08-17 2045-2322 https://pubs.kist.re.kr/handle/201004/128969 One of the top design priorities for semiconductor chemical sensors is developing simple, low-cost, sensitive and reliable sensors to be built in handheld devices. However, the need to implement heating elements in sensor devices, and the resulting high power consumption, remains a major obstacle for the realization of miniaturized and integrated chemoresistive thin film sensors based on metal oxides. Here we demonstrate structurally simple but extremely efficient all oxide chemoresistive sensors with similar to 90% transmittance at visible wavelengths. Highly effective self-activation in anisotropically self-assembled nanocolumnar tungsten oxide thin films on glass substrate with indium-tin oxide electrodes enables ultrahigh response to nitrogen dioxide and volatile organic compounds with detection limits down to parts per trillion levels and power consumption less than 0.2 microwatts. Beyond the sensing performance, high transparency at visible wavelengths creates opportunities for their use in transparent electronic circuitry and optoelectronic devices with avenues for further functional convergence. English NATURE PUBLISHING GROUP GLANCING ANGLE DEPOSITION GAS SENSORS ELECTRONIC NOSE HOLLOW HEMISPHERES CARBON NANOTUBES CHEMICAL SENSORS GRAIN-SIZE METAL NANOWIRE SENSITIVITY Self-activated ultrahigh chemosensitivity of oxide thin film nanostructures for transparent sensors Article 10.1038/srep00588 1 SCIENTIFIC REPORTS, v.2 SCIENTIFIC REPORTS 2 scie scopus 000308139900003 2-s2.0-84866060451 Multidisciplinary Sciences Science & Technology - Other Topics Article GLANCING ANGLE DEPOSITION GAS SENSORS ELECTRONIC NOSE HOLLOW HEMISPHERES CARBON NANOTUBES CHEMICAL SENSORS GRAIN-SIZE METAL NANOWIRE SENSITIVITY