International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 04 Special Issue: 09 | Sep -2017
p-ISSN: 2395-0072
www.irjet.net
One Day International Seminar on Materials Science & Technology (ISMST 2017) 4th August 2017 Organized by
Department of Physics, Mother Teresa Women’s University, Kodaikanal, Tamilnadu, India
STRUCTURAL AND SURFACE MORPHOLOGY STUDIES OF ZINC SULPHIDE NANOPOWDERS T. Vandhana1, Dr. A.J. Clement Lourduraj2 1. Research Scholar, Dept. of Physics, St. Joseph’s College (Autonomous), Tiruchirrapalli – 620002. 2.. Assistant Proffesor, Dept. of Physics, St. Joseph’s College (Autonomous), Tiruchirrapalli – 620002. Corresponding Author Email –ajeevaclement@gmail.com ,Vandhanat101@gmail.com ---------------------------------------------------------------------------***-------------------------------------------------------------------------ABSTRACT - Zinc sulphide (ZnS) is one of the first 1.1 Aim of the work semiconductors discovered. Zinc sulphide (ZnS) nanostructures have attracted increasing attention due to their potential application in both conditional optical devices and new generation of nano-electronics and nanooptoelectronics because of their special structure-related chemical and physical properties. Nano powders of ZnS were prepared by control precipitation method due to its simple, inexpensive and reproducible quality. Nano powders prepared by utilizing zinc of ZnS were acetate[Zn(CH 3COO)22H2O] and sodium hydroxide in deionised water. Complementary investigation such as XRay Diffraction, SEM are used to study structural and morphology of ZnS nano powders Microstructural studies indicate that powders were crystalline in nature. It is found that grain size for the preferential orientation is about 20nm. It has traditionally shown remarkable versatility and promise for novel fundamental properties and diverse applications.
The aim of the present work is to prepare the ZnS Nanopowder by control precipitation method and to study its structural properties 1.2. SIZE DEPENDENCE OF PROPERTIES
Keywords: Nano electronics, Morphology, XRD, Nano powder
Many properties of solids depend on the size range over which they are measured. Microscopic details become averaged when investigating bulk materials. At the macro-or large-scale range ordinarily studied in traditional fields of physics such as mechanic, electricity and magnetism, and optics, the size of the objects under study range from millimeters to kilometers. The properties that we associate with these materials are averaged properties, such as the density and elastic moduli in mechanics, the resistivity and magnetization in electricity and magnetism, and the dielectric constant in optics. When measurements are made in the micrometer or nanometer range, many properties of materials such as mechanical, ferroelectric, and ferromagnetic changes.
1. INTRODUCTION
1.3 Application Of Nano powders
Cluster of atom / molecules having dimensions in the order of nanometer (less than 100 nm) is known as nanopowders or nanomaterials. It shows atom-like behaviors which result from higher surface energy due to their large surface area and wider band gap between valence and conduction band when they are divided to near atomic size.Nanostructured materials have gained special interest in recent years due to their novel properties providing new ideas in physics to explain it. The properties of nanosized materials have generated a great deal of interest because of the science involved in these studies and technological applications of these materials. Semiconductor nanoparticles have attracted much attention because of their novel electric and optical properties originating from surface and quantum confinement effects.
Nano powder has many applications in different fields and some are given below:
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Ceramics used in nano sized powders are more ductile at elevated temperatures compared to coarse grained ceramics and can be sintered at low temperatures Nano sized powders of iron and copper have hardness about 4-6 times higher than the bulk materials because bulk materials have dislocations. The detection of viruses and bacteria at earliest as possible is a primary goal in the medical community to cure various different diseases. This goal is satisfactorily done by the Nano particles. Gold coated Nano particles are used to detect HIV viruses. Metal nano Powders are used to detect dendrimers. Ultra small super paramagnetic iron oxide (USPIO) Particles in the blood recognize target which is ISO 9001:2008 Certified Journal
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