Kulwinder Singh
@cuchd.in
Assistant Professor, University Centre for Research and Development
Chandigarh University
Currently, I have joined as an Assistant Professor at University Centre for Research and Development, Chandigarh University, Punjab. I am working on the synthesis and characterization of different nanomaterials, thin film deposition, transport properties, and device-based applications of nanostructures (Metal oxides, Nitrides, and Sulphides).
EDUCATION
Doctor of Philosophy in Nanotechnology-2021
Master of Technology in Nanotechnology- 2016
Bachelor of Technology in Nanotechnology-2015
FUTURE PROJECTS
Nanomaterials for Photodetection Applications
Applications Invited
Nanomaterials for Gas Sensing Applications
Applications Invited
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Soumili Roy, Kulwinder Singh, and Abhishek Kumar
EDP Sciences
Biodegradable polymer nanocomposites have gained attention in recent years owing to their antimicrobial activity. The article summarizes recent developments in improving antimicrobial, mechanical and barrier properties of biodegradable polymers chitosan, cellulose, gelatin and starch. ZnO, TiO2, reduced graphene oxide and silver reinforced biodegradable polymer nanocomposites exhibit improved tensile strength due to intercalation of nanomaterials into the polymer matrices. Silver nanoparticle reinforced polymer nanocomposites have shown significant antimicrobial properties against various strains of bacteria and fungi. Although, development of antimicrobial nanomaterials embedded packaging films has helped to augment shelf-life of food, leakage of nanomaterials into the packaged food remains an area of concern.
Kulwinder Singh, Sawini, Anup Thakur, and Akshay Kumar
Springer Nature Singapore
Kajal Kaushik, Ruby Priya, Harmanpreet Kaur, Kulwinder Singh, and O. P. Pandey
Springer Nature Singapore
Ishant Chauhan, Manjot Kaur, Kulwinder Singh, Ram K. Sharma, Ankush Vij, Anup Thakur, and Akshay Kumar
Springer Science and Business Media LLC
In this work, photo- and temperature-dependent electrical properties of thermally deposited WTe2 thin film have been reported. The n-type behaviour of WTe2 film of thickness ~ 122 nm has been observed. The dark conductivity analysis revealed that thermally activated conduction mechanism is responsible for charge carrier transport. In the presence of light, WTe2 shows higher current than dark conditions response towards light with two activation energies of ~ 0.374 eV and 0.692 eV signifying the dominance of bimolecular recombination under light illumination. On–off cycle determined the respective current variation with different light intensities. The fabricated device possesses responsivity ~ 0.36 mA/W and detectivity of ~ 3.2 × 109 Jones.
Manjot Kaur, Kulwinder Singh, Ram K. Sharma, Nandni Sharma, Anup Thakur, and Akshay Kumar
Elsevier BV
Manjot Kaur, Kulwinder Singh, Ankush Vij, and Akshay Kumar
Royal Society of Chemistry (RSC)
This review provides a comprehensive understanding of the synthesis, properties and applications of boron carbon nitride in consort with recent developmental trends and future perspectives.
Jagpreet Singh, Pardeep Kaur, Preet Kaur, Vishal Kumar, Kulwinder Singh, and Tejbir Singh
Elsevier BV
Sachin Pundir, Ruby Priya, Kulwinder Singh, Harmanpreet Kaur, and Prashant Choudhary
IOP Publishing
Abstract Cerium oxide (CeO2), also known as, ceria, is a well-known n-type semiconductor material. It finds potential roles in various field applications such as catalysis, sensing and antibacterial. It is widely used as a photocatalyst for treatment of waste water pollutants, because of the variable oxidation state of cerium i.e. +3, and +4. Many reports are available in literature which deals with the synthesis and properties of CeO2. The properties of CeO2 are highly dependent on the synthesis conditions such as precursors, additives, calcination temperature and type of synthesis route. In this review article, synthesis of CeO2 by various chemical routes are discussed in detail.
Monika Narang, Ruby Priya, Ankita Tiwari, Amanjot Kaur, Kulwinder Singh, and O P Pandey
IOP Publishing
Abstract The present research aims to study the structural, morphological and bandgap studies of 1mol% Ce doped Gd2O3 samples. Gd1.99Ce0.01O3 sample was synthesized via hydrothermal method. The crystallinity, phase and crystallite size are determined using X-ray diffraction (XRD) patterns. X-ray diffraction patterns revealed the development of pure crystalline phase Gd2O3 sample. The morphology of the synthesized sample is examined using Field emission scanning electron microscope (FESEM) micrographs and elemental composition by energy dispersive spectroscopy (EDS) spectra. FESEM results confirmed the formation of rod shape of the synthesized samples. The bandgap studies are done using UV-Visible spectroscopy. The synthesized samples are the potential candidates for various biomedical, and optoelectronic applications.
Ishant Chauhan, Manjot Kaur, Kulwinder Singh, Ram K. Sharma, Manjeet Kumar, Ju-Hyung Yun, and Akshay Kumar
Elsevier BV
Manjot Kaur, Kulwinder Singh, Ram K. Sharma, and Akshay Kumar
Elsevier BV
Monika, Kulwinder Singh, Manjot Kaur, Anup Thakur, Ram K. Sharma, Ankush Vij, and Akshay Kumar
Springer Science and Business Media LLC
Ishant Chauhan, Manjot Kaur, Kulwinder Singh, Manjeet Kumar, Anup Thakur, Ankush Vij, and Akshay Kumar
Elsevier BV
Manjot Kaur, Kulwinder Singh, Ishant Chauhan, Ram K. Sharma, Ankush Vij, and Akshay Kumar
Springer Science and Business Media LLC
The electrical properties of boron carbon nitride (BCN) were studied using a thin-film device of the material. Fourier transform infrared spectroscopy spectrum demonstrates the atomic intermixing of boron, carbon, and nitrogen in BCN film. Also, bonding configuration and linkage of carbon with more electronegative nitrogen atoms were observed. X-ray photoelectron spectroscopy analysis shows the dominance of graphitic carbon and h-BN domains in the deposited film. The photoluminescence studies of the deposited film show a broad emission in the ultraviolet and visible region due to band-to-band transition of BCN and defect states-induced emission, respectively. The deposited film shows the low dielectric constant value of 2.97 with the variation of temperature and frequency. Low-temperature studies show an increase in conductivity (obtained σ = 2.98 × 10–4 S/cm) from 223 to 273 K due to the dominance of BCN superlattice. In contrast, a reduction in conductivity is observed from 273 to 300 K with the increase in inter-grain boundary area and the ascendency of the boron nitride domain.
Jugraj Singh, Kulwinder Singh, Manjot Kaur, Anup Thakur, Ram K. Sharma, Ankush Vij, and Akshay Kumar
Elsevier BV
Nandni Sharma, Kulwinder Singh, Sanjeev Kumar, and Ashish Garg
Elsevier BV
Jaswinder Singh, Kulwinder Singh, Manjot Kaur, Ram K. Sharma, Ankush Vij, and Akshay Kumar
Elsevier BV
Manjot Kaur, Kulwinder Singh, and Akshay Kumar
AIP Publishing
In this work, temperature-dependent electrical transport and photoconductivity studies of WSe2/MoS2 nanocomposite thin films have been analyzed. An n-type semiconductor film of ≈150 nm with a carrier concentration of ≈1023cm−3 is prepared by a thermal evaporation technique. Temperature-dependent (150–350 K) conductivity results present more than one type of carrier transport mechanisms. Trap states from chalcogenide vacancies in WSe2/MoS2 play an important role in the formation of localized states. The electrical conductivity of the composite conforms to Mott’s variable range-hopping model due to these localized states in the temperature range of 150–250 K. Nearest-neighbor hopping and a thermally activated conduction mechanism are responsible for electrical transport in the higher temperature range. The role of defect/trap states and random local potential fluctuations in persistent photoconductivity has also been studied. Also, the effect of vacuum and air atmosphere shows that acceptor states resulting from incorporation of oxygen in sulfur vacancies results in more photocurrent in air than vacuum. The results deepen the understanding of the conduction mechanism in such multifunctional transition-metal dichalcogenide based nanocomposites.
Manjot Kaur, Rameez Ahmad Mir, Ishant Chauhan, Kulwinder Singh, Unni Krishnan, Manish Kumar, Pooja Devi, O.P. Pandey, and Akshay Kumar
Elsevier BV
Paviter Singh, Manjot Kaur, Kulwinder Singh, Ramovatar Meena, Manjeet Kumar, Ju-Hyung Yun, Anup Thakur, Fumiko Nakagawa, Minoru Suzuki, Hiroyuki Nakamura,et al.
Elsevier BV
Manjot Kaur, Kulwinder Singh, Ishant Chauhan, Hardilraj Singh, Ram K. Sharma, Ankush Vij, Anup Thakur, and Akshay Kumar
Elsevier BV
Kulwinder Singh, Manjot Kaur, Ishant Chauhan, Ramovatar Meena, Jagtar Singh, Anup Thakur, and Akshay Kumar
Springer Science and Business Media LLC
Boron nitride (BN) has encouraged researchers to use it in composite materials due to its different properties. BN-based nanocomposites have been synthesized using a modified chemical method. X-ray diffraction (XRD) results confirmed the formation of hexagonal-BN and nickel oxide (NiO) phases in samples. XRD analysis shows that samples are textured along (100) plane which distorts structure and leads to formation of defect states. The electron density difference between BN and NiO as well as textural growth are two main reasons for variation in diffraction peak intensities. Raman spectroscopic results also revealed that peak intensity and position shifts with increase in NiO content, due to the distortions induced by NiO incorporation confirming the presence of defect states. Field emission scanning electron microscopy (FESEM) results showed that morphology of synthesized nanocomposites varies with increase of NiO concentration. Ultra-violet (UV)-visible results revealed that the absorption edge is red-shifted with NiO content, consequently, the band-gap energy of composites get decreased. Distorted crystal structure and defect states are responsible for variation in structural, morphological as well as optical properties. Results suggested that the nanocomposites can be explored for photodetection as well as gas sensing applications.
Kulwinder Singh, Manjot Kaur, Ishant Chauhan, Hardilraj Singh, Amit Awasthi, Manjeet Kumar, Anup Thakur, and Akshay Kumar
Springer Science and Business Media LLC
Hybrid materials exhibit excellent properties than their components. Herein, boron nitride and boron nitride/nickel oxide (BN80/NiO20) nanocomposite films were deposited by the drop-casting method. X-ray diffraction, Raman spectroscopy and field emission scanning electron microscopy techniques have been utilized for determining structural, defect chemistry and morphological properties of deposited films. The structural analysis confirmed the formation of BN and NiO phases. Nelson–Riley Factor analysis and Raman analysis revealed the presence of defect states in BN80/NiO20 film. Electrical properties of films were studied in the presence of various concentrations of ammonia gas molecules at different temperatures. BN80/NiO20 composite film showed higher resistivity in the presence of ammonia gas than pure BN film. Variation of electrical resistivity with ammonia gas concentration has been explained through a proposed model. Also, to obtain the resistivity variation concerning ammonia gas concentrations at different temperatures, the linear regression method was used. This work insight the electrical behavior of composite material at different gas concentrations which opens these materials for exploration towards gas sensing and different functional applications.
Kulwinder Singh, Manjot Kaur, and Akshay Kumar
CRC Press
Kulwinder Singh, Gurpreet Kaur, Manjot Kaur, Ishant Chauhan, Manjeet Kumar, Anup Thakur, and Akshay Kumar
Elsevier BV