Characterization and photonic absorption of hierarchical tree-like CdS nanostructure synthesized by solvothermal method

• Main Authors: Phuruangrat A., Thongtem T., Thongtem S.
• Format: Article
• Language: English
• Published: 2014
• Online Access: http://www.scopus.com/inward/record.url?eid=2-s2.0-84861581819&partnerID=40&md5=817bf887f86bb5d9b1b95304d106b84d; http://cmuir.cmu.ac.th/handle/6653943832/6740
• Institution: Chiang Mai University

Hierarchical tree-like wurtzite CdS nanostructure was successfully synthesized by the 200°C and 24 h solvothermal reaction of cadmium nitrate and thiourea as starting materials in 1:1 volume ratio of diethylenetriamine and ethylenediamine as a mixed solvent. Phase and morphology of the as-synthesized CdS product were characterized by X-ray diffraction (XRD), Raman spectroscopy and transmission electron microscopy (TEM), including its photonic absorption by UV-visible spectroscopy. XRD spectrum and TEM image showed hexagonal wurtzite CdS structure with a 1-2 μm prototypical cluster, composed of a number of limbed nanorods. Its Raman spectrum was specified as the first-order (1LO) and second-order (2LO) longitudinal optical phonon modes at 298 and 599 cm - 1. UV-visible spectrum shows an absorption peak centered at around 489 nm, assigned as the excitonic transition, blue shifted comparing to its bulk. © 2012 Elsevier B.V. All rights reserved.