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
P.E. Lokhande, Udayabhaskar Rednam, Syed Khasim, Taymour A. Hamdalla, Amol Vedpathak, Deepak Kumar, and Kulwinder Singh
Elsevier BV
Shakshi Singh, Nagaraju Sunnam, Fiona Elza Correya, Ritika Soni, Kulwinder Singh, Prasad Eknath Lokhande, Seepana Praveenkumar, Malini Shashank Bapat, Suresh Ghotekar, Deepak Kumar,et al.
Springer Science and Business Media LLC
Isha Raina, Pawan Kumar, Abhishek Kumar, Kulwinder Singh, Anand Somvanshi, Sawini, Ritika Soni, and Deepak Kumar
Elsevier BV
Sawini, Kulwinder Singh, Abhishek Kumar, and Shagun Nag
IOP Publishing
Abstract In recent years, tin disulfide (SnS2) nanostructures have possessed substantial research interest due to tunable characteristics including crystallographic, emission, linear as well as non-linear optical parameters and their theoretical aspects etc. In present work, two-dimensional SnS2 nanostructures were synthesized through simple hydrothermal method. Structural analysis signifies the formation of hexagonal phase (space group symmetry: P63mc). Raman and FTIR spectroscopy techniques also revealed the formation of hexagonal phase and presence of Sn-S and S-S stretching vibrational modes in the prepared SnS2 nanostructures respectively. Morphological and elemental analysis inferred that synthesized nanostructures exhibit a hexagonal sheet like morphology and uniform Sn and S elemental distribution. XPS analysis also indicated the presence of individual elements i.e. Sn and S in +4 and −2 energy states in the synthesized nanostructures. Furthermore, the stability of prepared SnS2 nanostructures have been revealed by TGA analysis. Density functional theory (DFT) studies such as phonon dispersion curves as well as projected density of states signifies the stability of the SnS2 layered structure. Photoluminescence results revealed the emission in visible region i.e. ∼469, ∼566 and ∼603 nm. Ultraviolet -visible spectroscopic results inferred that the reflectance edge lies in visible spectrum with band gap value of ∼2.30 eV. Numerous empirical models were also employed to investigate the linear along with non-linear optical parameters and discussed in detail.
Pritam Das, Nandni Sharma, Kulwinder Singh, Sur Sharma Kongbrailatpam, Sawini, Mukul Kumar, Sanjeev Kumar, Ashish Kumar Mall, Deepak Kumar, and Suresh Ghotekar
Springer Science and Business Media LLC
Aarushi Chauhan, Abhishek Kumar, Kulwinder Singh, Aayush Gupta, Ashish Kumar, Sawini, Pawan Kumar, and Jyoti
IOP Publishing
Abstract In this work, we have functionalized ZnO nanoparticles (NPs) with N-[3-(tri-methoxy-silyl)-propyl]-ethylenediamine to prepare hybrid ZnO/Ag nanostructures. A multi-technique characterization approach has been adopted to unravel structural, morphological and optical properties of the pristine ZnO and hybrid ZnO/Ag nanostructures. The presence of silver nanoparticles on ZnO is supported by XRD, SEM and EDS. SEM results show the presence of silver NPs on the surface of ZnO nanoparticles. Raman analysis reveals a significant broadening and shift of peaks towards lower energy along with reduction in E2 mode intensity for ZnO/Ag hybrid nanostructures, specifying lower crystallinity as compared to ZnO NPs. A higher concentration of defects is supported by Nelson-Riley factor analysis for ZnO/Ag-I hybrid. Photoluminescence quenching shows the high charge-separation efficiency or low electron–hole recombination of hybrid nanostructures. An improvement in the photocatalytic activity of ZnO/Ag-I and ZnO/Ag-II hybrid nanostructures is observed for the degradation of methylene blue, nitrophenol and doxycycline dyes as compared to ZnO. Photocatalytic performance further improved with increase in Ag content due to surface phonon resonance mechanism leading to augmented charge separation.
Raj Kumar, Deepak Kumar, P.E. Lokhande, Vishal Kadam, Chaitali Jagtap, Amol Suhas Vedapathak, Kulwinder Singh, Yogendra Kumar Mishra, and Ajeet Kaushik
Elsevier BV
Ashish Kumar, Abhishek Kumar, Bandita Datta, Moutushi Dutta Choudhury, Kulwinder Singh, Sawini, and Shivani Singla
IOP Publishing
Abstract Enhancing the heat transfer properties of PDMS is critical for advancing its application in microfluidic systems, despite its inherent advantages of flexibility and biocompatibility. The study aims to augment PDMS's heat dissipation characteristics by incorporating silver nano-shells (SNS), synthesised by coating amine functionalized silica nanoparticles (NPs) with silver. The thermal conductivity of PDMS/SNS nanocomposites increases with higher SNS concentrations (1, 2, and 3 wt.%), reaching up to 0.357 W/(m·K), higher than 0.175 W/(m.K) value for pristine PDMS. Sessile water drop evaporation tests demonstrated more than 50% increase in drop evaporation rate on PDMS nanocomposites as compared to pristine PDMS at 3 wt.% SNS loadings, suggesting improved heat transfer pathways. The evaporation behaviour is quantitatively analysed and fitted using a theoretical framework for drop drying. Thermogravimetric and differential thermogravimetric analysis of the PDMS/SNS nanocomposites show that nanofillers have improved the thermal stability of the PDMS matrix in the temperature range of 300–460 °C and the decomposition temperature of pristine PDMS is lower as compared to PDMS nanocomposites. Theoretical calculations revealed that the oxygen atoms in PDMS, exhibit affinity for the silver atoms, indicating that SNS is likely to adsorb onto the polar oxygen sites of the PDMS chains without covalent bond formation. Electrostatic potential contour plots showed that the polarity of Si-O bond reduces due to delocalisation of charge density over the entire molecule, as a consequence of silver atom affinity towards polar oxygen sites. Therefore, the hydrophobicity of PDMS surface is significantly affected, resulting in higher contact angle as observed experimentally. In addition, incorporation of 3% SNS into PDMS matrix decreases the transmittance from 90% to 10% in the wavelength range of 350 nm to 900 nm.
Ritika Soni, P. E. Lokhande, Deepak Kumar, Vishal Kadam, Chaitali Jagtap, Udayabhaskar Rednam, Ritika Singh, Kulwinder Singh, Shailesh Padalkar, and Bandar Ali Al-Asbahi
Springer Science and Business Media LLC
Kulwinder Singh, Manjot Kaur, Ram K. Sharma, Neha Sharma, and Akshay Kumar
Springer Science and Business Media LLC
Sakshi Pathak, J. O. Morales-Ferreiro, Gerardo Silva-Oelker, Shristi Chaudhary, Monika Shrivastav, Chandra Kumar, Kulwinder Singh, Vikas Kashyap, Naveen Kumar, Fernando Guzman,et al.
Springer Science and Business Media LLC
Ritika Soni, Vatika Soni, P. E. Lokhande, Deepak Kumar, Nabisab Mujawar Mubarak, Seepana Praveenkumar, Raj Kumar, Kulwinder Singh, Udayabhaskar Rednam, Radhamanohar Aepuru,et al.
Royal Society of Chemistry (RSC)
Photocatalysis has emerged as a crucial technology for utilizing solar energy to combat global warming and energy shortages.
Sawini, Kulwinder Singh, Abhishek Kumar, Deepak Kumar, Ankit Kumar, Ashish Kumar, Sanjoy Kr Mahatha, and Seepana Praveenkumar
Elsevier BV
Jyoti, Kulwinder Singh, Abhishek Kumar, Deepak Kumar, Sawini, Shakshi Singh, Ashish Kumar, Azmat Ali Khan, Abdul Malik, and Aarushi Chauhan
Springer Science and Business Media LLC
Sur Sharma Kongbrailatpam, Kulwinder Singh, Nandni Sharma, Sawini, Pritam Das, Deepak Kumar, Mukul Kumar, Sanjeev Kumar, Suresh Ghotekar, P E Lokhande,et al.
IOP Publishing
Abstract In this paper, undoped and doped (Fe, Co and Fe-Co) nickel oxide (NiO) nanostructures have been synthesized using co-precipitation method. Prepared samples were characterized for the structural, compositional, morphological and optical properties using x-ray diffraction, scanning electron microscopy (SEM), Energy dispersive spectrocopy (EDS), UV-visible spectroscopy and photoluminescence spectroscopy. Structural analysis confirmed the single cubic phase formation of undoped and doped samples. Defect chemistry showed that Fe-Co co-doped NiO possesses a lower density of defects than other samples. SEM results revealed the agglomeration of particles. EDS results confirmed the presence of Ni, O, Fe and Co in the respective undoped and doped samples. Optical analysis revealed the band edge shifts with the incorporation of dopants in the NiO crystal lattice confirmed the variation of band gap energy. Emission peaks were observed in the UV and visible regions. The Incorporation of dopants in the crystal lattice causes variation of emission centers. Surface oxygen vacancies and imperfections significantly impact the emission characteristics of NiO. Variable spectral response of NiO with dopant incorporation has potential for optoelectronic applications.
Ashish Kumar Mall, Nandni Sharma, Kulwinder Singh, and A.K. Pramanik
Elsevier BV
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.
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.
Jagpreet Singh, Pardeep Kaur, Preet Kaur, Vishal Kumar, Kulwinder Singh, and Tejbir Singh
Elsevier BV
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.