Zinc Sulphide: A Nanostructured Material

Title: Zinc Sulphide: A Nanostructured Material
Authors: Dr. Laishram Raghumani Singh, Dr Md Raheijuddin Sheikh (Shamu), Dr. A. Nabachandra Singh
ISBN: 978-81-933788-9-2
Edition: 1
Language: English
Category: Chemistry

About the Book:

Zinc Sulfide (ZnS), also known as “Zincblende” or “Wurtzite” based on its structure in the pure form, has many applications in the present society including the latest technology as phosphorescence phosphor, scintillation detectors. It has also high antioxidant and antifungal properties. Many researches have been undertaken for new developments in the fields related to the synthesis, characterization, validation and authentication of the ZnS nano materials. This work is a tryst to bring everyone in the world of physical techniques which are being involved in synthesis of the ZnS in a very simple and cost effective approach, more specifically by the Chemical Bath Deposition (CBD) and characterization with amazing results. 

Materials with reduced particle sizes to nanometer scale are gaining unique noble properties over those in their bulk states in optical, electrical and photoelectronic properties. The basic reason is that the particles of the materials in nano scale exhibit quantum confinement effects. Of the three classes of nanoparticles, quantum dots which exists nearly in zero dimension under quantum confinement effect with particle diameters l-10 nm is the centre of attraction of the current nanoscience research for different technological applications. The physical reason is that materials under quantum confinement effect possess a number of allowed energy states at this lowest dimension within the band gaps which under suitable photo-excitation can generate unique noble properties.

In the present investigation, the synthesis of Poly Vinyl Alcohol (PVA) embedded ZnS matrix nano-composite films are carried out by CBD technique at different molarities, substrate temperatures and film thickness. Study of the nanostructures and several photoconductivity properties of the films under illumination of white lights of different intensities in air under different experimental conditions are carried out and discovered that the material is suitable for efficient solar photovoltaic cells, photo detectors and quantum computers under suitable conditions.

By manipulating the atoms and molecules in the matrix ZnS films at different molarities, substrate temperatures and film thickness and on exposure to different intensity of white lights in air under suitable applied biases applied fields and ambient temperatures, new photoluminescence and photo-electronic properties will be expected far better than those in their bulk states.

About the Authors:

Dr. Laishram Raghumani Singh son of Shri Laishram Chaobhal Singh was born on the 1^st March 1976 in a small village called Awang Jiri, Nambol under Bshnupur District in Manipur. He completed MSc in Physics from Ch. Charan Singh University, Meerut, MPhil in Physics from Madurai Kamaraj University and PhD in Physics from CMJ University, Shillong. Till date, has published more than 10 research papers in the reputed Journals and presented about 15 papers in the National / International Seminars/Conferences. Presently, he is teaching in D M College of Science, Imphal.

Born in 1968 at Sangaiyumpham Part-I in Thoubal District, Manipur, Dr Md Raheijuddin Sheikh (Shamu) is known for his works in Science and Literature. He did BSc with Physics (Hons) from D M College of Science, Imphal, MSc in Physics from Manipur University and PhD from Gauhati University on his thesis “Physical Methods (Techniques) in studies of Indian Cultural Heritage” under the supervision of Prof. Anurup Gohain Barua, published more than 15 research papers in the peer reviewed journals, 12 in conference/seminar proceedings, completed 2 Research Projects: 1 under UGC, New Delhi & the other under HMS, UK.

“Physics for Cultural Heritage”, “My date with a Pretty Slag”, “Selected Science Plays”, “Education for Employment”, “Scientific Methods for Cultural Heritage Research” are some of the books published at the National and International levels, “Khong-ngu Nang-gi Banshi” is the book of literature awarded the 1^st Prize in the All India Competition for radio playwrights - 2000,  “Mass Media in Conflict Zones” & “Dating with River Terraces” are some of the titles published as co-author.

Dr Sheikh served as a Principal on regular basis in Manipur College from 2014 to 2016, completed the India-Australia VELT Programme under the UGC-AICTE & Australian TAFE Directors as a Skill India Mission. He is currently serving as the Director of the Deen Dayal Upadhyay Centre for KAUSHAL at Dhanamanjuri Community College, a Centre for skill based Programmes, R&D in the higher education sector in addition to teaching as Associate Professor in D M College of Science, Imphal.

Dr. A. Nabachandra Singh was born on 1st March 1964 at Khekman, Thoubal District, Manipur, India. He completed M.Sc. in Physics topping with first class from NEHU, Shillong in 1986. He earned Ph. D. from Manipur University in 2002 on his thesis "Thermoluminescence studies of quartz and feldspars having Applications to Dating" under the supervision of Prof. R. K. Gartia. He joined teaching as a Lecturer in Physics in Government Colleges in September 1987. He was serving as Principal at Lilong Haoreibi College, Lilong, Manipur from 2014 to 2016. Right now he is teaching Physics at Thoubal College, Thoubal Manipur.

Dr. Singh has completed three research projects two of which were sponsored by UGC and one by AERB, Mumbai. So far he had published more than 30 original research papers in peer reviewed journals and about 40 research papers in Conference Proceedings. He has authored a book entitled "The Salt: Luminescently Cooked" and co-authored a book entitled "Dating with River Terraces" published by Ruby Press & Co. Pvt. Ltd., New Delhi. His areas of interest are Luminescence Dating/Dosimetry and Nanomaterials for applications of in vivo optical imaging.