Preparation and Characterization of CdSe Nanoparticles Synthesized Using the Ultrasonic Irradiation

Sung, Myoung Seok; Lee, Yoon Bok; Kim, Yong Jin; Kim, Jae Won

doi:10.4028/3-908451-31-0.1229

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“…The CdSe nanocrystals are undoubtedly the most studied due to their tunable emission in the visible range, and the advances in the different techniques of its preparation, the possible uses in industrial and biomedical applications and in other research areas make it a very promising material [2,[8][9][10][11]. This material is a n-type semiconductor with a direct band gap of 1.74 eV and shows two crystalline phases: hexagonal and cubic [12][13][14][15][16].…”

Section: Introduction mentioning

confidence: 99%

Morphological Characterization with STM and SEM of CdSe Nanostructures in Function of pH

Legorreta¹,

Francisco²,

Sanabria³

et al. 2019

JMSE-A

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In this paper, we have interest in the CdSe (cadmium selenide) semiconductor due to their physical and optical properties that depend on their morphology and size, as well as their possible applications in electronic and optoelectronic fields, for example, in the fabrication of solar cells or nanotransistors. For this reason, we synthetized nanoparticles of CdSe using the colloidal method, and varied the pH value: 8 to 12, to know the effect of pH on the samples. The nanoparticles were characterized using the SEM (scanning electron microscope) and STM (scanning tunneling microscope) to know the morphology and electronic cloud on the surface of the samples. In each case, we found different sizes (from 6 to 11.5 nm) and shapes as filaments (fibbers), bars and spheres of CdSe nanoparticles and the 3D-FFT was obtained too.

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