Diamondoid Nanostructures as sp 3 ‐Carbon‐Based Gas Sensors

• Published in: Angewandte Chemie Vol. 131; no. 29; pp. 10038 - 10043
• Main Authors: Moncea, Oana, Casanova‐Chafer, Juan, Poinsot, Didier, Ochmann, Lukas, Mboyi, Clève D., Nasrallah, Houssein O., Llobet, Eduard, Makni, Imen, El Atrous, Molka, Brandès, Stéphane, Rousselin, Yoann, Domenichini, Bruno, Nuns, Nicolas, Fokin, Andrey A., Schreiner, Peter R., Hierso, Jean‐Cyrille
• Format: Journal Article
• Language: English; French
• Published: Wiley-VCH Verlag 15.07.2019
• Subjects: Chemical Sciences
• ISSN: 0044-8249; 1521-3757
• DOI: 10.1002/ange.201903089

Abstract Diamondoids, sp 3 ‐hybridized nanometer‐sized diamond‐like hydrocarbons (nanodiamonds), difunctionalized with hydroxy and primary phosphine oxide groups, enable the assembly of the first sp 3 ‐C‐based chemical sensors by vapor deposition. Both pristine nanodiamonds and palladium nanolayered composites can be used to detect toxic NO 2 and NH 3 gases. This carbon‐based gas sensor technology allows reversible NO 2 detection down to 50 ppb and NH 3 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 m 2  g −1 ) and channel nanoporosity derive from H‐bonding.