Diamondoid Nanostructures as sp3-Carbon-Based Gas Sensors

Identifier:  imarina:5747821

Handle: https://hdl.handle.net/20.500.11797/imarina5747821

Authors:  Moncea, O; Casanova-Chafer, J; Poinsot, D; Ochmann, L; Mboyi, CD; Nasrallah, HO; Llobet, E; Makni, I; El Atrous, M; Brandès, S; Rousselin, Y; Domenichini, B; Nuns, N; Fokin, AA; Schreiner, PR; Hierso, JC

Abstract:
Diamondoids, sp3 -hybridized nanometer-sized diamond-like hydrocarbons (nanodiamonds), difunctionalized with hydroxy and primary phosphine oxide groups, enable the assembly of the first sp3 -C-based chemical sensors by vapor deposition. Both pristine nanodiamonds and palladium nanolayered composites can be used to detect toxic NO2 and NH3 gases. This carbon-based gas sensor technology allows reversible NO2 detection down to 50?ppb and NH3 detection at 25-100?ppm concentration with fast response and recovery processes at 100?°C. Reversible gas adsorption and detection is compatible with 50?% humidity conditions. Semiconducting p-type sensing properties are achieved from devices based on primary phosphine-diamantanol, in which high specific area (ca. 140?m2 ?g-1 ) and channel nanoporosity derive from H-bonding.© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.