Bioinspired Out-of-Equilibrium Conductive Hydrogels: Unlocking Fuel and Light-Responsive Transient Conducting Properties Ruchi Shukla, Rajarshi Chakraborty, Vijay Kumar Patel, Subrat Vishwakarma, Bhola Nath Pal, Divya B. Korlepara, Pandeeswar Makam ACS Nano, 2025 The development of out-of-equilibrium supramolecular hydrogels, inspired by biological systems, has attracted considerable interest due to their potential applications in nanotechnology. Despite this, these transient hydrogels' (opto-)electronic properties remain elusive. This study introduces a bioinspired dissipative hydrogel powered by a chemical fuel, exhibiting tunable conducting and photoelectronic functionalities. A bio-organic bolaamphiphile (PA) was designed and synthesized, integrating the optoelectronic characteristics of perylene diimide (P) with the reversible gel-triggered switching capabilities of l-aspartic acid (A). Precise temporal control over the supramolecular self-assembly and disassembly of the PA hydrogel was achieved by regulating the chemical fuel dimethyl sulfate (DMS). Results demonstrate that the PA-based dissipative self-assembly can reversibly switch between an insulating sol state and a conductive gel state, accompanied by nanostructural, fluorescence, and chiroptical switching. Furthermore, a thin film derived from the hydrogel exhibited photoresponsive conductivity switching capability. PA's transient structural, chemical, and functional properties were extensively characterized using spectroscopic, microscopic, computational, and device fabrication techniques. This study not only elucidates the structure-property relationships in dissipative hydrogels but also contributes to the development of adaptive, life-like functional nanomaterials with promising applications in optoelectronics, nanotechnology, and soft robotics.
Graphitic Carbon Nitride-Copper Oxide Nanocomposites with Enhanced Peroxidase-Mimicking and Electrocatalytic Activity for Vitamin B12Detection Ankush Kumar Singh, Subrat Vishwakarma, Rashmi Yadav, Vijay Kumar Patel, Pandeeswar Makam, Rosy ACS Applied Nano Materials, 2025 Vitamin B 12 (VB 12 ) is essential for a variety of metabolic processes. Its lack and excess can both cause serious disorders. Given the increased reliance on VB 12 supplements, creating a precise and quick point-of-care VB 12 sensor is critical. In this investigation, graphitic carbon nitride and copper oxide composite (gCN.CuO) is used to develop a dual-mode sensor for the colorimetric and voltammetric detection of VB 12 . First, gCN.CuO is employed as a peroxidase-mimetic nanozyme to catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB). The addition of VB 12 is shown to quench the UV–vis band corresponding to ox TMB at 652 nm due to specific interactions between VB 12 and gCN.CuO. Based on the same principle, the indirect colorimetric sensing system for VB 12 has been developed. Furthermore, a direct electrochemical sensor based on a gCN.CuO-modified screen-printed electrode (gCN.CuO|SPE) for chemical-free detection of VB 12 is proposed. The gCN.CuO|SPE demonstrated remarkable electrocatalytic activity toward VB 12, showcasing a 3.5x higher peak current with ∼25 mV negative potential shift. With a 50 μL sample requirement, the electrochemical sensor exerted excellent sensitivity with an extensive linear range (1–400 μM) and an LOD of 159.5 nM. The gCN.CuO|SPE selectively detected VB 12 in the presence of various potential interferents and real samples demonstrating potential real-life applicability.
Proximal Contractions for Multivalued Mappings with an Application to 2D Volterra Integral Equations Haroon Ahmad, Mudasir Younis, Hami Gündoǧdu, Nisha Barley, Vijay Kumar Patel Mathematics, 2024 In this paper, we delve into the ideas of Geraghty-type proximal contractions and their relation to multivalued, single-valued, and self mappings. We begin by introducing the notions of (ψω)MCP-proximal Geraghty contraction and rational (ψω)RMCP-proximal Geraghty contraction for multivalued mappings, aimed at establishing coincidence point results. To enhance our understanding and illustrate the concepts, practical examples are provided with each definition. This study extends these contractions to single-valued mappings with the introduction of (ψω)SCP-proximal Geraghty contraction and rational (ψω)RSCP-proximal Geraghty contraction, supported by relevant examples to reinforce the main results. Then, we explore (ψω)SFP Geraghty contraction and rational (ψω)RSFP contraction for self-mappings, obtaining fixed point theorems and clearly illustrating them through examples. Finally, we apply the theoretical framework developed to investigate the existence and uniqueness of solutions to certain two-dimensional Volterra integral equations. Specifically, we consider the transformation of first-kind Volterra integral equations, which play crucial roles in modeling memory in diverse scientific fields like biology, physics, and engineering. This approach provides a powerful tool for solving difficult integral equations and furthering applied mathematics research.
Numerical wavelets scheme to complex partial differential equation arising from Morlet continuous wavelet transform Vijay Kumar Patel, Somveer Singh, Vineet Kumar Singh Numerical Methods for Partial Differential Equations, 2021 Abstract In this article, a new wavelets approximation scheme based on operational matrices has been discussed for the solutions of proposed initial value complex partial differential equation (CPDE) which is arising from continuous wavelet transform. We developed an algorithm using transformation to obtain the numerical solution of CPDE with a numerical wavelet collocation method based on two‐dimensional Legendre wavelet (TDLW) and two‐dimensional Bernoulli wavelet (TDBW) operational matrices. We converted CPDE into a system of partial differential equations (PDEs) and this system of PDEs converted into couple PDEs in terms of the real and imaginary component. Finally, we obtained a system of partial integro‐differential equations (PIDEs) with nonlocal boundary conditions. After implementation of wavelets scheme on PIDEs, PIDEs reduced into a system of algebraic equations. In the sequence of this, we also investigated the convergence analysis of TDLW, TDBW, and error analysis, respectively. Finally, illustrative examples are included to demonstrate the validity and applicability of the presented wavelet scheme for the proposed problem.
A Machine Learning Model for Solving Lane–Emden Equation Using Legendre Wavelet Neural Network DKNK Vijay Kumar Patel, Abhishekh https://link.springer.com/chapter/10.1007/978-981-95-1058-0_24 , 2026 2026
An Efficient Method for Solving Lane–Emden Equation Using Legendre Neural Network VK Patel, V Sharma, N Kumar, AK Tiwari https://link.springer.com/chapter/10.1007/978-981-96-5732-2_24 , 2025 2025
A modified weighted model of annual rainfall forecasting using fuzzy time series techniques BP Singh, Rinku, Abhishekh, AK Nishad, VK Patel Life Cycle Reliability and Safety Engineering, 1-11 , 2025 2025
Proximal Contractions for Multivalued Mappings with an Application to 2D Volterra Integral Equations VK Patel, H Ahmad, M Younis, H Gündoǧdu, N Barley Mathematics 12 (23), 3716 , 2024 2024 Citations: 4
AgriTransformer: Synergizing Robust Deep Transformer model for Intelligent Farming V Sharma, VK Patel, Y Sahu, M Vyas Springer Nature , 2024 2024 Citations: 1
A New Moving Average Time Series Forecasting Model Using Frequency Approach in Fuzzy Environment, Abhishekh, D Kumar, VK Patel Springer , 2024 2024
A new efficient operational matrix method for solving various fractional partial differential equation with space-time derivative VK Patel Proceeding of the National Academy of Sciences , 2024 2024
An efficient finite difference scheme for fractional partial differential equation arising in electromagnetic waves model VK Patel International Journal of Nonlinear Analysis and Applications 14 (10), 163-178 , 2023 2023 Citations: 4
Numerical and approximate solutions for two-dimensional hyperbolic telegraph equation via wavelet matrices VK Patel, D Bahuguna Proc. Natl. Acad. Sci., India, Sect. A Phys. Sci. , 2022 2022 Citations: 9
An efficient matrix approach for the numerical solutions of electromagnetic wave model based on fractional partial derivative VK Patel, D Bahuguna Applied Numerical Mathematics 169, 1-20 , 2021 2021 Citations: 14
Numerical solutions of electromagnetic wave model of fractional derivative using class of finite difference scheme VK Patel, D Bahuguna arxiv.org/abs/2103.01612 , 2021 2021
Numerical wavelets scheme to complex partial differential equation arising from Morlet continuous wavelet transform VK Patel, S Singh, VK Singh Numerical methods for partial differential equations 37 (2), 1163-1199 , 2020 2020 Citations: 17
Lagrange operational matrix methods to Lane–Emden, Riccati’s and Bessel’s equations V Devi, RK Maurya, VK Patel, VK Singh International Journal of Applied and Computational Mathematics 5 (3), 79 , 2019 2019 Citations: 14
Two dimensional wavelets collocation scheme for linear and nonlinear Volterra weakly singular partial integro-differential equations VK Patel, S Singh, VK Singh, E Tohidi International Journal of Applied and Computational Mathematics 4 (5), 132 , 2018 2018 Citations: 33
Convergence rate of collocation method based on wavelet for nonlinear weakly singular partial integro‐differential equation arising from viscoelasticity S Singh, VK Patel, VK Singh Numerical Methods for Partial Differential Equations 34 (5), 1781-1798 , 2018 2018 Citations: 29
Application of Bernoulli matrix method for solving two-dimensional hyperbolic telegraph equations with Dirichlet boundary conditions S Singh, VK Patel, VK Singh, E Tohidi Computers & Mathematics with Applications 75 (7), 2280-2294 , 2018 2018 Citations: 43
Application of wavelet collocation method for hyperbolic partial differential equations via matrices S Singh, VK Patel, VK Singh Applied Mathematics and Computation 320, 407-424 , 2018 2018 Citations: 49
Application of Piecewise Expansion based on 2D Legendre Wavelets for Fractional Partial Differential Equation VK Patel, VK Singh, EB Postnikov International Journal of Pure and Applied Mathematics 119 (16), 5159-5167 , 2018 2018 Citations: 8
Two‐dimensional shifted Legendre polynomial collocation method for electromagnetic waves in dielectric media via almost operational matrices VK Patel, S Singh, VK Singh Mathematical Methods in the Applied Sciences 40 (10), 3698-3717 , 2017 2017 Citations: 43
Two-dimensional wavelets collocation method for electromagnetic waves in dielectric media VK Patel, S Singh, VK Singh Journal of Computational and Applied Mathematics 317, 307-330 , 2017 2017 Citations: 33
MOST CITED SCHOLAR PUBLICATIONS
Operational matrix approach for the solution of partial integro-differential equation S Singh, VK Patel, VK Singh Applied Mathematics and Computation 283, 195-207 , 2016 2016 Citations: 52
Numerical solution of nonlinear weakly singular partial integro-differential equation via operational matrices S Singh, VK Patel, VK Singh, E Tohidi Applied Mathematics and Computation 298, 310-321 , 2017 2017 Citations: 50
Application of wavelet collocation method for hyperbolic partial differential equations via matrices S Singh, VK Patel, VK Singh Applied Mathematics and Computation 320, 407-424 , 2018 2018 Citations: 49
Application of Bernoulli matrix method for solving two-dimensional hyperbolic telegraph equations with Dirichlet boundary conditions S Singh, VK Patel, VK Singh, E Tohidi Computers & Mathematics with Applications 75 (7), 2280-2294 , 2018 2018 Citations: 43
Two‐dimensional shifted Legendre polynomial collocation method for electromagnetic waves in dielectric media via almost operational matrices VK Patel, S Singh, VK Singh Mathematical Methods in the Applied Sciences 40 (10), 3698-3717 , 2017 2017 Citations: 43
Two dimensional wavelets collocation scheme for linear and nonlinear Volterra weakly singular partial integro-differential equations VK Patel, S Singh, VK Singh, E Tohidi International Journal of Applied and Computational Mathematics 4 (5), 132 , 2018 2018 Citations: 33
Two-dimensional wavelets collocation method for electromagnetic waves in dielectric media VK Patel, S Singh, VK Singh Journal of Computational and Applied Mathematics 317, 307-330 , 2017 2017 Citations: 33
Convergence rate of collocation method based on wavelet for nonlinear weakly singular partial integro‐differential equation arising from viscoelasticity S Singh, VK Patel, VK Singh Numerical Methods for Partial Differential Equations 34 (5), 1781-1798 , 2018 2018 Citations: 29
Numerical wavelets scheme to complex partial differential equation arising from Morlet continuous wavelet transform VK Patel, S Singh, VK Singh Numerical methods for partial differential equations 37 (2), 1163-1199 , 2020 2020 Citations: 17
An efficient matrix approach for the numerical solutions of electromagnetic wave model based on fractional partial derivative VK Patel, D Bahuguna Applied Numerical Mathematics 169, 1-20 , 2021 2021 Citations: 14
Lagrange operational matrix methods to Lane–Emden, Riccati’s and Bessel’s equations V Devi, RK Maurya, VK Patel, VK Singh International Journal of Applied and Computational Mathematics 5 (3), 79 , 2019 2019 Citations: 14
Numerical and approximate solutions for two-dimensional hyperbolic telegraph equation via wavelet matrices VK Patel, D Bahuguna Proc. Natl. Acad. Sci., India, Sect. A Phys. Sci. , 2022 2022 Citations: 9
Application of Piecewise Expansion based on 2D Legendre Wavelets for Fractional Partial Differential Equation VK Patel, VK Singh, EB Postnikov International Journal of Pure and Applied Mathematics 119 (16), 5159-5167 , 2018 2018 Citations: 8
Proximal Contractions for Multivalued Mappings with an Application to 2D Volterra Integral Equations VK Patel, H Ahmad, M Younis, H Gündoǧdu, N Barley Mathematics 12 (23), 3716 , 2024 2024 Citations: 4
An efficient finite difference scheme for fractional partial differential equation arising in electromagnetic waves model VK Patel International Journal of Nonlinear Analysis and Applications 14 (10), 163-178 , 2023 2023 Citations: 4
AgriTransformer: Synergizing Robust Deep Transformer model for Intelligent Farming V Sharma, VK Patel, Y Sahu, M Vyas Springer Nature , 2024 2024 Citations: 1
A Machine Learning Model for Solving Lane–Emden Equation Using Legendre Wavelet Neural Network DKNK Vijay Kumar Patel, Abhishekh https://link.springer.com/chapter/10.1007/978-981-95-1058-0_24 , 2026 2026
An Efficient Method for Solving Lane–Emden Equation Using Legendre Neural Network VK Patel, V Sharma, N Kumar, AK Tiwari https://link.springer.com/chapter/10.1007/978-981-96-5732-2_24 , 2025 2025
A modified weighted model of annual rainfall forecasting using fuzzy time series techniques BP Singh, Rinku, Abhishekh, AK Nishad, VK Patel Life Cycle Reliability and Safety Engineering, 1-11 , 2025 2025
A New Moving Average Time Series Forecasting Model Using Frequency Approach in Fuzzy Environment, Abhishekh, D Kumar, VK Patel Springer , 2024 2024