Fabrication of diamond nanorods for gas sensing applications

✍ Scribed by Marina Davydova; Alexander Kromka; Bohuslav Rezek; Oleg Babchenko; Martin Stuchlik; Karel Hruska

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 421 KB
• Volume: 256
• Category: Article
• ISSN: 0169-4332
• DOI: 10.1016/j.apsusc.2010.03.034

✦ Synopsis

Diamond nanorods were fabricated for a sensing device by utilizing reactive ion etching in CF 4 /O 2 radio frequency plasma. The length of the nanorods has been controlled by the ion etching time. The obtained morphologies were investigated by scanning electron microscopy. The gas sensing properties of the Hterminated diamond-based sensor structures are indicating that we have achieved high sensitivity to detect phosgene gas. Also, our sensor exhibited good selectivity between humid air and phosgene gas if the measurement is conducted at elevated temperatures, such as 140 • C. Furthermore, such sensor response rating could reach as high value as 4344 for the phosgene gas, which was evaluated for the sample consisting of the longest nanorods (up to 200 nm).