title: Fluctuation-enhanced sensing with organically functionalized gold nanoparticle gas sensors targeting biomedical applications.
abstract: Detection of volatile organic compounds is a useful approach to non-invasive diagnosis of diseases through breath analysis. Our experimental study presents a newly developed prototype gas sensor, based on organically-functionalized gold nanoparticles, and results on formaldehyde detection using fluctuation-enhanced gas sensing. Formaldehyde was easily detected via intense fluctuations of the gas sensor's resistance, while the cross-influence of ethanol vapor (a confounding factor in exhaled breath, related to alcohol consumption) was negligible.
authors: Faculty of Electronics, Telecommunications and Informatics, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland.
authors: Łukasz
authors: Ł
authors: Lentka
authors: Faculty of Electronics, Telecommunications and Informatics, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland.
authors: Mateusz
authors: M
authors: Kotarski
authors: Faculty of Electronics, Telecommunications and Informatics, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland. Electronic address: jsmulko@eti.pg.gda.pl.
authors: Janusz
authors: J
authors: Smulko
authors: Department of Engineering Sciences, The Ångström Laboratory, Uppsala University, SE-75121 Uppsala, Sweden.
authors: Umut
authors: U
authors: Cindemir
authors: Department of Engineering Sciences, The Ångström Laboratory, Uppsala University, SE-75121 Uppsala, Sweden.
authors: Zareh
authors: Z
authors: Topalian
authors: Department of Engineering Sciences, The Ångström Laboratory, Uppsala University, SE-75121 Uppsala, Sweden.
authors: Claes G
authors: CG
authors: Granqvist
authors: Department of Electronics, Rovira i Virgily University, 43006 Tarragona, Spain.
authors: Raul
authors: R
authors: Calavia
authors: Department of Electronics, Rovira i Virgily University, 43006 Tarragona, Spain. Electronic address: radu.ionescu@urv.cat.
authors: Radu
authors: R
authors: Ionescu
mesh_terms: D001944:Breath Tests; D005557:Formaldehyde / Q000032:analysis* / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D056951:Photoelectron Spectroscopy
chemical_list: D005557:Formaldehyde; D006046:Gold
keywords: Flicker noise; Fluctuation enhanced sensing; Formaldehyde detection; Organically-functionalized gold nanoparticles