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1.
Thermal properties of surface-modified [alpha] and [epsilon]-Fe [sub] 2O [sub] 3 photocatalysts determined by beam deflection spectroscopy
Fernando Fresno, Mladen Franko, Dorota Korte, Giorgio Carraro, 2014, objavljeni znanstveni prispevek na konferenci

Najdeno v: ključnih besedah
Povzetek najdenega: ...photocatalytic activity, photothermal beam deflection spectroscopy, thin films, ...
Ključne besede: photocatalytic activity, photothermal beam deflection spectroscopy, thin films
Objavljeno: 16.06.2016; Ogledov: 3904; Prenosov: 144
URL Polno besedilo (0,00 KB)

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Basics and applications of photothermal beam deflection spectroscopy;
Dorota Korte, 2016, objavljeni povzetek znanstvenega prispevka na konferenci (vabljeno predavanje)

Najdeno v: ključnih besedah
Ključne besede: beam deflection spectroscopy, photothermal effects, material characterization
Objavljeno: 07.11.2016; Ogledov: 3725; Prenosov: 526
.pdf Polno besedilo (1,07 MB)

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Determination of Trace Cr(VI) with Diphenylcarbazide by μFIA–Thermal Lens Microscopy
Tatyana Gor’kova, Michail Proskurnina, Mingqiang Liu, Mladen Franko, 2016, izvirni znanstveni članek

Opis: The optimum reaction parameters for the interaction of hexavalent chromium [Cr(VI)] with diphenylcarbazide in microfluidic chips (μFIA) with thermal-lens microscopic detection were selected. The characteristic feature of the applied flow scheme is the injection of the reagent into the stream containing the test metal, which enables in-field and real-time monitoring of Cr(VI) simply by flowing the sample continuously through the microchip. The limit of detection of Cr(VI) under the selected conditions (signal generating wavelength, 514.5 nm; excitation power, 100 mW; detection position, 10 cm downstream from the mixing zone of the microchip; flow rate 10 μL min–1; injection volume, 1.4 μL) is 15 ng mL–1 (2.9 × 10–7 mol L–1). The linear range is 40 ng mL–1 – 10 μg mL–1 with a relative standard deviation no higher than 10% in the concentration range 0.1–1 μg mL–1. The online monitoring by this scheme provides the possibility of up to 360 analyses per hour.
Najdeno v: ključnih besedah
Povzetek najdenega: ... Photothermal lensing, thermal-lens microscopic detection, microfluidic applications, μFIA,...
Ključne besede: Photothermal lensing, thermal-lens microscopic detection, microfluidic applications, μFIA, hexavalent chromium, diphenylcarbazide
Objavljeno: 12.12.2016; Ogledov: 3428; Prenosov: 0
.pdf Polno besedilo (312,62 KB)

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Experimental sessions: digital lock-in photothermal shadowgraph method
Dorota Korte, Angel Cifuentes, vabljeno predavanje na konferenci brez natisa

Najdeno v: ključnih besedah
Ključne besede: Photothermal beam deflection technique, photothermal shadowgraph method
Objavljeno: 13.03.2017; Ogledov: 3498; Prenosov: 0
.pdf Polno besedilo (153,22 KB)

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Experimental sessions: Thermal lens microscopy
Dorota Korte, Muhammad Sulaiman Yousafzai, prispevek na konferenci brez natisa

Najdeno v: ključnih besedah
Povzetek najdenega: ...Thermal lens microscopy, photothermal effect...
Ključne besede: Thermal lens microscopy, photothermal effect
Objavljeno: 14.03.2017; Ogledov: 3609; Prenosov: 0
.pdf Polno besedilo (153,22 KB)

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PHOTOTHERMAL-DEFLECTION SPECTROSCOPY FOR THE DETERMINATION OF THERMAL DIFFUSIVITY OF SOILS AND SOIL AGGREGATES
Mikhail A. Proskurnin, Dorota Korte, O.B. Rogova, D.S. Volkov, Mladen Franko, 2017, objavljeni povzetek znanstvenega prispevka na konferenci

Najdeno v: ključnih besedah
Ključne besede: PHOTOTHERMAL-DEFLECTION SPECTROSCOPY, THERMAL DIFFUSIVITY, soil, soil aggregates
Objavljeno: 30.08.2017; Ogledov: 3099; Prenosov: 0
.pdf Polno besedilo (12,87 MB)

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Trace Detection and Photothermal Spectral Characterization by a Tuneable Thermal Lens Spectrometer with White-Light Excitation
Mladen Franko, Dorota Korte, Humberto Cabrera, 2018, izvirni znanstveni članek

Opis: In the thermal lens experimental set-up we replaced the commonly employed pump laser by a halogen lamp, combined with an interference lter, providing a tuneable, nearly monochromatic pump source over the range of wavelengths 430–710 nm. Counter-propagating pump and probe beams are used and a 1 mm path-length sam- ple cell together with the interference lter makes an optical cavity, providing ampli cation of the thermal lens signal, which leads to enhancement of the measurement sensitivity, and enables detection of absorbances on the order of 5×10− 6. Ampli ed thermal lens signal allows us to replace the typical lock-in ampli er and digital os- cilloscope with a silicon photodetector, Arduino board, and a personal computer, offering the possibility for a compact, robust and portable device, useful for in- eld absorption measurements in low concentration or weakly absorbing species. The use of a white light source for optical pumping, an interference lter for wavelength selection and direct diagnostic of the thermal lens signal increase the versatility of the instrument and simpli- es substantially the experimental setup. Determination of Fe(II) concentrations at parts per billion levels was performed by the described white-light thermal lens spectrophotometer and the absorption spectrum for 50μg/ L Fe(II)-1,10-phenanthroline was well reproduced with an average measurement precision of 4%. The obtained limits of detection and quantitation of Fe(II) determination at 510nm are 3μgL− 1 and 11μgL− 1, respectively. The calibration curve was linear in the concentration range of LOQ-500μgL− 1 with reproducibility between 2% and 6%, con rming that this instrument provides good spectrometric capabilities such as high sensitivity, tune- ability and good reproducibility. In addition, the versatility of the instrument was demonstrated by recording the photothermal spectrum of gold nanostructured material and determination of excitation wavelength with most ef cient optical to thermal energy conversion, which differs considerably (cca 100 nm) from the absorption maximum of the investigated sample.
Najdeno v: ključnih besedah
Ključne besede: thermal lens spectrometry, Fe(II) determination, photothermal technique, multi-wavelength excitation
Objavljeno: 21.02.2018; Ogledov: 3045; Prenosov: 0
.pdf Polno besedilo (889,82 KB)

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