منابع مشابه
Development of a Hyphenated Method Called DLLME/TLM for Trace Analysis of Cd
Dispersive Liquid-Liquid Microextraction / Thermal Lens Microscopy (DLLME/TLM) was developed as a new combination method for preconcentration and determination of Cd. Thermal Lens Microscopy is suitable for the determination of analyte after DLLME because of the low volume of the remained phase after DLLME and increasing of the enhancement factor for the nonpolar organic solvents. Some effe...
متن کاملContributions of transient absorption and population lens in thermal lens spectroscopy
Contaminations of the population lens and transient absorption in thc obsened thermal lens signal sometimes cause a misinterpretation of the signal. Rcccntly, we ha1.c developed several methods to evaluate the relative contributions of these components in thc observed thermal lens signal. These methods with reccnt results are sumtnarizcd, and mcrits and limitations of each method are discussed.
متن کاملSpatial resolution improvement of scanning microscopy based on thermal lens spectroscopy with a total-internal-reflection arrangement.
In scanning microscopy by total internal reflection with thermal lens spectroscopy, its spatial resolution depends on the distance between the sample and a converging lens, which corresponds to the objective lens in an ordinary optical microscope. It was found that the resolution was best when the signal induced by the thermal lens effect was maximum. The distance was precisely adjusted by moni...
متن کاملThermal lens spectrum of organic dyes using optical parametric oscillator.
The wavelength dependence of thermal lens signal from organic dyes are studied using dual beam thermal lens technique. It is found that the profile of thermal lens spectrum widely differ from the conventional absorption spectrum in the case of rhodamine B unlike in the case of crystal violet. This is explained on the basis of varying contribution of nonradiative relaxations from the excited vib...
متن کاملStudy on the determination of molecular distance in organic dye mixtures using dual beam thermal lens technique.
A sensitive method based on the principle of photothermal phenomena to study the energy transfer processes in organic dye mixtures is presented. A dual beam thermal lens method can be very effectively used as an alternate technique to determine the molecular distance between donor and acceptor in fluorescein-rhodamine B mixture using optical parametric oscillator.
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تاریخ انتشار 2010