
Name: 		Highly sensitive gas and ethanol vapor sensors based on car-bon heterostructures for room temperature detection

Authors: 	Michal Kočí1,2*, Pawel S. Wrobel3,4, Marcin Godzierz3, Ondrej Szabó1, Sławomira Pusz3, Štěpán Potocký1, Miroslav Husák2, Alexander Kromka1

Affiliations:	1 Department of Semiconductors, Institute of Physics of the Czech Academy of Sciences, Cukrovarnicka 10/112, Prague 6 162 00, Czech Republic
		2 Department of Microelectronics, Faculty of Electrical Engineering, Czech Technical University in Prague, Technická 2, Prague 6, 166 27, Czech Republic
		3 Centre of Polymer and Carbon Materials of the Polish Academy of Sciences, ul. M. Curie Skłodowskiej 34, Zabrze, 41-819, Poland
		4 Łukasiewicz Research Network – PORT Polish Center for Technology Development, ul. Stabłowicka 147, 54-066 Wrocław, Poland

Description:	Figure 1: Photographs of the prepared sensors after the sensing experiment, exploded schematic view and schematic layer cross-section of all fabricated and evaluated sensors
		Figure 2: Scanning electron microscope images of all tested sensors from Tescan MAIA 3
		Figure 3: Raman spectroscopy and measured data of GOs-based layers without and with 8h H-NCD normalized to G band from Renishaw inVia Reflex Confocal Raman microscope 
		Figure 4: Photographs of GOs sensor active parts 6 months after drop-casting
		Figure 5: Diagram of the gas sensor responses measuring apparatus
		Figure 6: Graphs and measured data of steady-state resistances, responses to 100 ppm of ethanol vapor, responses to 100 ppm of ammonia, and responses to 100 ppm of nitrous dioxide of all tested sensors
		Figure 7: Graphs and measured data of SH-GO / 8h H-NCD and rGO / 8h H-NCD to selected concentrations of gases 
		Figure 8: Graphs and measured data of cross-selectivity responses of SH-GO / 8h H-NCD to two ethanol concentrations (50 ppm and 100 ppm) under the influence of 100 ppm NO2 and 100 ppm NH3 and two NH3 concentrations (50 ppm and 100 ppm) under the influence of 100 ppm NO2
		Figure 9: Graphs and measured data of long-term time dependence of SH-GO / 8h H-NCD response to 100 ppm concentrations of all target gases
		Figure 10: Gas interactions between the gases and active layers
		Figure 11: Electrical models representations of active layers and graphs and measured data of current-voltage characteristic (I-V curve) of SH-GO / 8h H-NCD

Abbreviations:	GOs - Graphene oxides
		H-NCD - Hydrogen-terminated nanocrystalline diamond
		ppm - particles per milion
		SH-GO - Thiol-functionalized graphene oxide
		rGO - Reduce graphene oxide
		NO2 - Nitrogen dioxide
		I-V - Current-voltage