TY - JOUR
T1 - A microwave route for the synthesis of nanoflakes and dendrites-type β-In 2S 3 and their characterization
AU - Patra, Chitta Ranjan
AU - Patra, Sujata
AU - Gabashvili, Alexandra
AU - Mastai, Yitzhak
AU - Koltypin, Yuri
AU - Gedanken, Aharon
AU - Palchik, Valery
AU - Slifkin, Michael A.
PY - 2006/3
Y1 - 2006/3
N2 - In this article, a simple microwave route was applied for the synthesis of nanoflakes and dendrite-type β-indium sulfide (In 2S 3) in high yield (>97%), using a homogeneous mixture of indium(III)chloride and thiourea in an ethylene glycol (EG)/polyethylene glycol (PEG 400) solvent. The reaction was conducted in a simple domestic microwave oven (DMO). Powder X-ray diffraction (XRD), low resolution and high resolution transmission electron microscopy (LRTEM and HRTEM), selected area electron diffraction (SAED), and energy dispersive X-ray spectroscopy (EDS), were applied to investigate the crystallinity, structure, morphology, and composition of the In 2S 3 nanomaterials. Both the as-synthesized and calcined In 2S 3 products were a body-centered tetragonal (bet) phase, observed by XRD and HRTEM. The length and width of the resulting nanoflakes were in the range of 70-600 nm and 4-10 nm, respectively. The optical band gap of the powder was determined by diffuse reflectance spectroscopy (DRS) and was found to be 2.44 eV. The electronic properties of the products were studied by measuring the optical absorption spectra using photoacoustic spectroscopy. The band gap calculated by this method was found to be 2.52 eV. A possible mechanism for the formation of nanoflakes/dendrites-type In 2S 3 was also discussed.
AB - In this article, a simple microwave route was applied for the synthesis of nanoflakes and dendrite-type β-indium sulfide (In 2S 3) in high yield (>97%), using a homogeneous mixture of indium(III)chloride and thiourea in an ethylene glycol (EG)/polyethylene glycol (PEG 400) solvent. The reaction was conducted in a simple domestic microwave oven (DMO). Powder X-ray diffraction (XRD), low resolution and high resolution transmission electron microscopy (LRTEM and HRTEM), selected area electron diffraction (SAED), and energy dispersive X-ray spectroscopy (EDS), were applied to investigate the crystallinity, structure, morphology, and composition of the In 2S 3 nanomaterials. Both the as-synthesized and calcined In 2S 3 products were a body-centered tetragonal (bet) phase, observed by XRD and HRTEM. The length and width of the resulting nanoflakes were in the range of 70-600 nm and 4-10 nm, respectively. The optical band gap of the powder was determined by diffuse reflectance spectroscopy (DRS) and was found to be 2.44 eV. The electronic properties of the products were studied by measuring the optical absorption spectra using photoacoustic spectroscopy. The band gap calculated by this method was found to be 2.52 eV. A possible mechanism for the formation of nanoflakes/dendrites-type In 2S 3 was also discussed.
KW - Dendrites
KW - Indium Sulfide
KW - Microwave Heating
KW - Nanoflakes
KW - Polyol Route
KW - Semiconductors
UR - http://www.scopus.com/inward/record.url?scp=33645971341&partnerID=8YFLogxK
U2 - 10.1166/jnn.2006.134
DO - 10.1166/jnn.2006.134
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C2 - 16573148
AN - SCOPUS:33645971341
SN - 1533-4880
VL - 6
SP - 845
EP - 851
JO - Journal of Nanoscience and Nanotechnology
JF - Journal of Nanoscience and Nanotechnology
IS - 3
ER -