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566 results on '"Singh, Aparna"'

13. Mechanical response of butylamine based Ruddlesden Popper organic-inorganic lead halide perovskites

Author

Gupta, Yashika, Rathore, Sudharm, Singh, Aparna, and Kumar, Anshuman

Subjects
Physics - Applied Physics, Condensed Matter - Materials Science
Abstract

2D Ruddlesden Popper perovskites have been extensively studied for their exceptional optical and electronic characteristics while only a few studies have shed light on their mechanical properties. The existing literature mainly discusses the mechanical strength of single crystal perovskites, however a systematic study towards structure tunability of 2D perovskite thin films is still missing. In this study, we report the effect of number of inorganic layers `n' on elastic modulus of Butylammonium based 2D, quasi-2D perovskites and 3D perovskite using nanoindentation technique. The experimental results have also been substantiated using first principle density functional theory calculations. Understanding the mechanical behaviour of 2D Ruddlesden Popper perovskites thin films in comparison with conventional 3D perovskite offers intriguing insights into the atomic layer dependent properties and paves the path for next generation mechanically durable novel devices.

Published
2021

15. Physical Unclonable Function and Smart Contract-Based Authentication Protocol for Medical Sensor Network

Author

Singh, Aparna, Rathee, Geetanjali, Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Kumar, Sandeep, editor, Sharma, Harish, editor, Balachandran, K., editor, Kim, Joong Hoon, editor, and Bansal, Jagdish Chand, editor

Published
2023
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16. Material Recovery from End-of-Life Solar Photovoltaic Module Through Thermal and Chemical Processes

Author

Singh, Aparna, Kabir, Ahmed Ali, Gupta, Sachin, Singh, Jyotsna, Singh, R. B., Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Ivanov, Vitalii, Series Editor, Cavas-Martínez, Francisco, Editorial Board Member, di Mare, Francesca, Editorial Board Member, Haddar, Mohamed, Editorial Board Member, Kwon, Young W., Editorial Board Member, Trojanowska, Justyna, Editorial Board Member, Mehta, Hemant B., editor, Rathod, Manish K., editor, Abiev, Rufat, editor, and Arıcı, Müslüm, editor

Published
2023
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21. Bounding box-based 3D AI model for user-guided volumetric segmentation of pancreatic ductal adenocarcinoma on standard-of-care CTs

Author

Mukherjee, Sovanlal, Korfiatis, Panagiotis, Khasawneh, Hala, Rajamohan, Naveen, Patra, Anurima, Suman, Garima, Singh, Aparna, Thakkar, Jay, Patnam, Nandakumar G., Trivedi, Kamaxi H., Karbhari, Aashna, Chari, Suresh T., Truty, Mark J., Halfdanarson, Thorvardur R., Bolan, Candice W., Sandrasegaran, Kumar, Majumder, Shounak, and Goenka, Ajit H.

Published
2023
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31. Real-Time Face Recognition for Organisational Attendance Systems

Author

Bavikadi, Divyagna, Manjunatha, A., Pol, Abhishek, Kadam, Akshat, Kulkarni, Prajakta, Singh, Aparna, Kamble, P. M., Hegadi, Ravindra, Filipe, Joaquim, Editorial Board Member, Ghosh, Ashish, Editorial Board Member, Prates, Raquel Oliveira, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, Santosh, KC, editor, Hegadi, Ravindra, editor, and Pal, Umapada, editor

Published
2022
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48. Static and fatigue performance of graphene nanoplatelets coated bi‐directional carbon fiber‐epoxy composites under bending loads.

Author

Srivastava, Alok Kumar, Yerramalli, Chandra S., and Singh, Aparna

Subjects
MATERIAL fatigue, CARBON composites, NANOPARTICLES, FATIGUE life, GRAPHENE, LAMINATED materials, CARBON fibers
Abstract

The addition of graphene nanoplatelets as a nanofiller on the surface of pristine and oxidized carbon fiber for making reinforced polymer composites has shown improvement in monotonic flexural properties. However, the fatigue response of these laminates under bending loads has not been investigated so far. The current study aims to examine the monotonic and fatigue behavior of the graphene nanoplatelets (GNPs) coated bi‐directional pristine and oxidized carbon fiber epoxy composites under bending loads. Eight layers of fabrics were used to manufacture the laminates through vacuum‐assisted resin transfer molding technique (VARTM). An optimum amount of GNP addition on oxidized fiber leads to ~830‐fold enhanced fatigue life at higher stresses as compared to pristine laminates. However, excessive GNP addition on pristine as well as oxidized fiber leads to a deterioration in fatigue life. In‐situ optical microscopic examination was done to observe the crack initiation and propagation of all the specimens with respect to the number of cycles coupled with post‐mortem SEM images of the fracture surfaces. [ABSTRACT FROM AUTHOR]

Published
2024
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