Microscopic spectrophotometry applied to quasifractal gold particle clusters
Konferensbidrag (offentliggjort, men ej förlagsutgivet), 2000

An optical measurement system composed of an optical microscope (Olympus BX60) and an optical multichannel analyzer (EGG OMA 1460) has been assembled and tested. The optical microscope allows the user to make measurements on a small and well defined area of the sample. The light source, a 100 W halogen lamp, and the diode array detector, result in high sensitivity in the wavelength region of 450-750 nm. The spectral resolution of the instrument is listed as 0.59 nm/channel. The full width at half maximum (FWHM) of the strongest peaks in calibration measurements on a mercury lamp is 5 channels corresponding to 3 nm. Quasifractal clusters of gold particles have been produced with electron beam lithography. The clusters consists of different numbers of particles, giving a cluster size variation from 1.6 m to 50 m. The individual gold particles are 50 nm in diameter each. The measurement system has been used to measure both absolute transmittance and the relative transmittance using the uncoated substrate as a reference

spectrophotometry

particle size

metal clusters

gold

nanostructured materials

optical microscopy

particle size measurement

fractals

light transmission

Författare

J. Jonsson

J. Sotelo

G. A. Niklasson

A. Roos

Bengt Nilsson

Institutionen för fysik

Proceedings of the SPIE - The International Society for Optical Engineering

0277-786X (ISSN)

Vol. 4103 98-105

Styrkeområden

Nanovetenskap och nanoteknik

Materialvetenskap

Ämneskategorier

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