Advances in thermal lens spectrometry

Проскурнин, М. А.; Volkov, Dmitry S.; Gor’kova, T. A.; Bendrysheva, S. N.; Smirnova, A. P.; Nedosekin, Dmitry A.

doi:10.1134/s1061934815030168

Cited by 57 publications

(29 citation statements)

References 247 publications

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“…The implemented back-synchronized mode of the spectrometer features different measurement conditions for the blooming and dissipating of the transient thermal lens [2]. The advantage is the possibility of transient and steady-state measurements within a single set of experiments.…”

Section: Resultsmentioning

confidence: 99%

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Thermallens spectrometer for studying thermophysical properties of fullerenes

Mikheev¹,

Usoltseva²,

Ivshukov³

et al. 2018

Nanosystems: Phys. Chem. Math.

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A thermal-lens spectrometer implementing back-synchronized detection technique with a mode-mismatched optical scheme was constructed. Steady-state and transient signals of thermal-lens spectrometry are used to characterize concentration parameters of aqueous fullerene dispersions (AFDs) at the level of 10 −7 -10 −5 M and to assess thermophysical properties of AFDs. The detection limits of fullerenes in AFDs are 100 nM for C 60 , 80 nM for C 70 and C 78 -C 88 , and 60 nM for Y@C 82 , which are 20-fold lower than for spectrophotometry. Suitable precision of measurements of thermal diffusivity and thermal effusivity for AFDs is shown.

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Section: Resultsmentioning

confidence: 99%

“…Thermal-lens spectrometry (TLS) is used for the complex characterization of various materials [1,2]. This method is used for assessing the material optical parameters in UV/Vis/NIR governing or associated with the distribution of heat of different materials giving both thermal and optical properties in a single experiment [1,3].…”

Section: Introductionmentioning

confidence: 99%

Thermallens spectrometer for studying thermophysical properties of fullerenes

Mikheev¹,

Usoltseva²,

Ivshukov³

et al. 2018

Nanosystems: Phys. Chem. Math.

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“…39,42 These conditions can be attained by selecting lower modulation frequencies (which decrease the S/N ratio) 39 or switching to the asynchronous mode (heating and cooling half-cycles are independent), which is not always advantageous for fast in-flow measurements and cannot be based on lockin schemes. 44 Thus, for a 1 kHz modulation frequency and a lock-in detection, a maximal S/N is obtained for given optical scheme.…”

Section: The Effect Of the Flow Ratementioning

confidence: 92%

Determination of Trace Cr(VI) with Diphenylcarbazide by μFIA–Thermal Lens Microscopy

Gor’kova

Liu

Проскурнин

et al. 2016

ACSi

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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.

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“…The described examples of applications and list of references in this contribution and latest reviews, 16,37,87 demonstrate that TLS and TLM had already found many applications, and can provide highly sensitive analytical assays for the purpose of vanguard analytical methods with times of analysis shorter than 10, or even 1 min/sample in the case of TLS and TLM, respectively.…”

Section: Conclusion and Future Outlooksmentioning

confidence: 99%