| Title: | Engineering of SnO(2)-Graphene Oxide Nanoheterojunctions for Selective Room-Temperature Chemical Sensing and Optoelectronic Devices |
| Author(s): | Pargoletti E; Hossain UH; Di Bernardo I; Chen H; Tran-Phu T; Chiarello GL; Lipton-Duffin J; Pifferi V; Tricoli A; Cappelletti G; |
| Address: | "Dipartimento di Chimica, Universita degli Studi di Milano, via Golgi 19, Milano 20133, Italy. Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), Via Giusti 9, Firenze 50121, Italy. Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University, Canberra Australian Capital Territory 2601, Australia. Nanotechnology Research Laboratory, College of Engineering and Computer Science, The Australian National University, Canberra Australian Capital Territory 2601, Australia. Institute for Future Environments (IFE), Central Analytical Research Facility (CARF), Queensland University of Technology(QUT), Brisbane 4000, Australia" |
| Journal Title: | ACS Appl Mater Interfaces |
| ISSN/ISBN: | 1944-8252 (Electronic) 1944-8244 (Print) 1944-8244 (Linking) |
| Abstract: | "The development of high-performing sensing materials, able to detect ppb-trace concentrations of volatile organic compounds (VOCs) at low temperatures, is required for the development of next-generation miniaturized wireless sensors. Here, we present the engineering of selective room-temperature (RT) chemical sensors, comprising highly porous tin dioxide (SnO(2))-graphene oxide (GO) nanoheterojunction layouts. The optoelectronic and chemical properties of these highly porous (>90%) p-n heterojunctions were systematically investigated in terms of composition and morphologies. Optimized SnO(2)-GO layouts demonstrate significant potential as both visible-blind photodetectors and selective RT chemical sensors. Notably, a low GO content results in an excellent UV light responsivity (400 A W(-1)), with short rise and decay times, and RT high chemical sensitivity with selective detection of VOCs such as ethanol down to 100 ppb. In contrast, a high concentration of GO drastically decreases the RT response to ethanol and results in good selectivity to ethylbenzene. The feasibility of tuning the chemical selectivity of sensor response by engineering the relative amount of GO and SnO(2) is a promising feature that may guide the future development of miniaturized solid-state gas sensors. Furthermore, the excellent optoelectronic properties of these SnO(2)-GO nanoheterojunctions may find applications in various other areas such as optoelectronic devices and (photo)electrocatalysis" |
| Keywords: | UV photodetectors graphene oxide nanoheterojunctions room-temperature chemoresistive sensing selectivity tin dioxide; |
| Notes: | "PubMed-not-MEDLINEPargoletti, Eleonora Hossain, Umme H Di Bernardo, Iolanda Chen, Hongjun Tran-Phu, Thanh Chiarello, Gian Luca Lipton-Duffin, Josh Pifferi, Valentina Tricoli, Antonio Cappelletti, Giuseppe eng 2020/07/23 ACS Appl Mater Interfaces. 2020 Sep 2; 12(35):39549-39560. doi: 10.1021/acsami.0c09178. Epub 2020 Aug 24" |
