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Titolo:
Photothermal FT-IR spectroscopy: A step towards FT-IR microscopy at a resolution better than the diffraction limit
Autore:
Hammiche, A; Pollock, HM; Reading, M; Claybourn, M; Turner, PH; Jewkes, K;
Indirizzi:
Univ Lancaster, Sch Phys & Chem, Lancaster LA1 4YB, England Univ Lancaster Lancaster England LA1 4YB hem, Lancaster LA1 4YB, England Univ Loughborough, IPTME, Loughborough LE11 3TU, Leics, England Univ Loughborough Loughborough Leics England LE11 3TU 3TU, Leics, England Bruker UK Ltd, Coventry CV4 9GH, W Midlands, England Bruker UK Ltd Coventry W Midlands England CV4 9GH GH, W Midlands, England
Titolo Testata:
APPLIED SPECTROSCOPY
fascicolo: 7, volume: 53, anno: 1999,
pagine: 810 - 815
SICI:
0003-7028(199907)53:7<810:PFSAST>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
SCANNING THERMAL MICROSCOPY; RAMAN-SPECTROSCOPY; PROBE;
Keywords:
photothermal; FT-IR; near-field; scanning probe microscopy; SPM; scanning thermal microscopy; atomic force microscope; AFM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Pollock, HM Univ Lancaster, Sch Phys & Chem, Lancaster LA1 4YB, England Univ Lancaster Lancaster England LA1 4YB er LA1 4YB, England
Citazione:
A. Hammiche et al., "Photothermal FT-IR spectroscopy: A step towards FT-IR microscopy at a resolution better than the diffraction limit", APPL SPECTR, 53(7), 1999, pp. 810-815

Abstract

We have used a miniaturized Wollaston wire resistive thermometer as a probe to record infrared absorption spectra of polymeric samples by detecting photothermally induced temperature fluctuations at the sample surface. This method opens the way to absorption Fourier transform infrared spectroscopy/microscopy with a spatial resolution that is no longer diffraction limited,but is determined instead by the size of the contact between probe and sample. At present, this is on the order of a few hundred nanometers. The thermal probe, of a type used in scanning thermal microscopy and microthermal analysis, allows us to detect the photothermal response of a specimen exposed to the beam of a Fourier transform infrared spectrometer and heated thereby. The signal from this probe measures the resulting temperature fluctuations, and thus provides an interferogram which replaces the interferogram normally obtained by means of direct detection of the IR transmitted by a sample.

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Documento generato il 09/04/20 alle ore 13:03:47