2D nanostructures based flexible piezoelectric nanogenerator

Piezoelectric nanogenerators have received tremendous attraction because of their ability to power small scale nano-systems and portable electronic devices. In this talk, we will discuss the  synthesis of 2D molybdenum disulphide (MoS₂) nanosheets, borophene nanosheet-based and their heterostructures via hydrothermal method followed by ultrasonication. We fabricate a high-performance flexible piezoelectric nanogenerator based on as-grown MoS2 nanosheets, borophene and borophene–MoS₂ nanosheet heterostructures. Borophene–MoS₂ nanosheet heterostructure-based nanogenerator produces a high output voltage of 22 V and current density of 34 µA cm⁻² , while MoS2 nanosheet generated output voltage of 10 V and current of the 9 µA cm⁻². The heterostructures based nanogenerator shows an excellent energy conversion efficiency of 37%, outperforming their pristine components by almost ten times. The borophene-MoS2 nanosheets based heterostructure also shows high output voltage under UV light and mechanical strain, showing their applications for 2D-based self-powered UV sensor devices. 2D piezoelectric nanogenerators have also used to power personal electronics self-powered nanosensor.

Dr. Manoj Kumar Gupta received his Ph.D. degree from University of Delhi, India, in 2011. Presently, he is working as Senior Scientist at CSIR- Advanced Materials and Processes Research Institute (CSIR-AMPRI) Bhopal. He is also awarded with the prestigious CSIR-Young Scientist Award in Physical Science (Including Instrumentation)in 2020. He is also holding Assistant Professor in AcSIR. Dr. Gupta is also awarded with prestigious CSIR Raman Research Fellowship to visit Italy for research work at University of Rome Tor Vergata, Rome, Italy. He is member of the Indian National Young Academy of Sciences (INYAS), Govt of India. Prior to joining CSIR-AMPRI, Bhopal he worked as DST-INSPIRE Faculty at Indian Institute of Science Education and Research, Bhopal. He worked as post doctor fellow at Sungkyunkwan University, South Korea. He has visited various countries and given various scientific talk at USA, China. He also received DST-International Travel Support grant to present his research work in  Finland. His current research areas are nano-materials synthesis and fabrication of energy harvesting nanodevices such as piezoelectric, pyroelectric, triboelectric and hybrid nanogenerators and polymer composites. He has more than 75 international publications in reputed journals and has five international patents. He has transferred three know how and developed various innovative products such as Parali based Particle board as wood substitute, industrial waste based hybrid composite board and lead free X-Ray Radiation shielding panels, which is recently transfer to a leading industry. He has published various articles in high impact factor journal such as Nano Energy, ACS Nano, ACS Applied Material and Interfaces, Nanoscale, Advanced Materials, Communication Materials (Nature) and many more. He has guided 4 PhD student and completed many major projects as PI. His h-index is 33 and total citation of article is more than 5400..)