Fluorescent II-VI semiconductor quantum dots in living cells: nonlinear microspectroscopy in an optical tweezers system

Article Abstract:

A setup consisting of an optical tweezers combined with a nonlinear microspectroscopy system is used for performing scanning microscopy and for obtaining emission spectra by using two photon excited (TPE) luminescence of captured single living cells labeled with core-shell fluorescent semiconductor quantum dots (QDs). The results have shown the potential of II-VI fluorescent semiconductor QDs to perform spectroscopy in living trapped cells in any neighborhood and observe the cell chemical reactions in real time.

Analysis, Observations, Cells (Biology), Cells, Luminescence

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Model of peripheral protein adsorption to the water/lipid interface

Article Abstract:

The adsorption of colipase, a peripheral protein to phospholipid /diacylglycerol (PL/DG) monolayers is explained with the help of two models applicable at variable pressures and diacylglycerol mole fraction. The hydrophobic surface area in the first model is created by lipid heads, where as hydrocarbon chains are exposed in the second model.

Water, Phospholipids, Chemical properties, Report, Diacylglycerol

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Near-field two-photon-induced photoluminescence from single gold nanorods and imaging of plasmon modes

Article Abstract:

The two-photon-induced photoluminescence properties of single gold nanorods is investigated by scanning near-field spectroscopy. The process was found to be initiated by a sequential one-photon absorption for creating a pair of an electron and a hole in the sp and d bands.

Usage, Photoluminescence

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