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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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Au@ZnO core-shell nanoparticles (NPs) were prepared by a simple method followed by heat-treatment for gas sensor applications. The advantage of the core-shell morphology was investigated by comparing the gas sensing performances of Au@ZnO core-shell NPs with pure ZnO NPs and different wt% of Au-loaded ZnO NPs. The crystal structures, shapes, sizes, and morphologies of all sensingmaterials were characterized by XRD, TEM, and HAADF-STEM. Au@ZnO core-shell NPs were nearly spherical in shape and Au NPswere encapsulated in the center with a 40–45 nm ZnO shell outside. The gas sensing operating temperature for Au@ZnO core-shellNPs was 300°C, whereas it was 350°C for pure ZnO NPs and Au-loaded ZnO NPs. The maximum response of Au@ZnO core-shell NPs to 1000 ppm CO at 300°C was 77.3, which was three-fold higher than that of 2 wt% Au-loaded ZnO NPs. Electronic and chemicaleffects were the primary reasons for the improved sensitivity of Au@ZnO core-shell NPs. It was confirmed that Au@ZnO core-shellNPs had better sensitivity and stability than Au-loaded ZnO NPs.
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참고문헌 (23)
참고문헌 신청
S. Zhuiykov / 2008 / Carbon monoxide detection at low temperatures by semiconductor sensor with nanostructured Audoped CoOOH films / Sens. Actuators B Chem 129:431~441
N. L. Hung / 2010 / Enhancement of CO gas sensing properties in ZnO thin films deposited on self-assembled Au nanodots / Sens. Actuators B Chem 151:127~132
Y. J. Chiang / 2013 / PdO nanoflake thin films for co gas sensing at low temperatures / J. Phys. Chem. C 117:15593~15601
G. Neri / 2008 / Resistive CO gas sensors based on $In_{2}O_{3}$ and InSnOx nanopowders synthesized via starch-aided sol-gel process for automotive applications / Sens. Actuators B Chem 132:224~233
M. Hjiri / 2014 / Al-doped ZnO for highly sensitive CO gas sensors / Sens. Actuators B Chem 196:413~420
N. L. Hung / 2010 / Enhancement of CO gas sensing properties in ZnO thin films deposited on self-assembled Au nanodots / Sens. Actuators B Chem 151:127~132
Y. J. Chiang / 2013 / PdO nanoflake thin films for co gas sensing at low temperatures / J. Phys. Chem. C 117:15593~15601
G. Neri / 2008 / Resistive CO gas sensors based on
M. Hjiri / 2014 / Al-doped ZnO for highly sensitive CO gas sensors / Sens. Actuators B Chem 196:413~420
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