ResourceSpectroscopy

Identification and Sizing of Exosomes and Microvesicles by Raman Micro-Spectroscopy Combined with Tunable Resistive Pulse Sensing

20 May 2015

To study the role of vesicles under physiological and pathological conditions and to employ vesicles as biomarkers for disease, the size, concentration and cellular origin is preferably measured of single vesicles. This application note describes the use of a hybrid TRPS Raman micro-spectroscopy setup for sizing vesicles down to 100 nm. Additionally the first Raman spectrum of a single platelet derived vesicles is presented.

Newton CCD Camera

Oxford Instruments Andor

The Newton CCD camera is ideally suited to high-performance spectroscopic applications. The high-resolution sensors deliver up to 95% QE. Combined with Andor Technology’s low noise electronics, it provides convenient multi-Megahertz readout and USB connectivity. The camera utilizes a 1024 x 255 array of 26μm² pixels with thermoelectric cooling down to -100°C resulting in negligible dark current. The system offers the best performance for a wide range of spectroscopic applications across VUV-NIR wavelengths.

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Identification and Sizing of Exosomes and Microvesicles by Raman Micro-Spectroscopy Combined with Tunable Resistive Pulse Sensing