Dr Bhaskar Dudem is a Research Fellow (Post-Doc.) at Advanced Technology Institute (ATI), Uni. Surrey. He received his M.Tech. and PhD degrees from the Indian Institute of Technology Kanpur, India, and Kyung Hee University (KHU), South Korea., respectively. He further worked at KHU as a Post-Doc for one year, also worked at K.L. University, India, as a teaching faculty. His research has resulted in more than 30 publications in peer-reviewed journals, has an h-index of 20, with citations circa 800 (Google scholar).
Areas of specialism
Strategies to maximize the surface charge density across triboelectric layers while protecting it from humidity are crucial in employing triboelectric nanogenerators (TENGs) for commercial/real-time applications. Herein, for the first time, we propose the utility of crystalline silk microparticles (SMPs) to improve the surface charge density in materials like polyvinyl alcohol to realise its applicability for TENG devices. Moreover, these SMPs are extracted from discarded Bombyx mori silkworm cocoons by facile, inexpensive, and single-step alkaline-hydrolysis treatment. We examine the performance of these composites with counter-materials composed of waste PTFE plastic cups to show reuse in recycled products. The processing cost of TENG developed from recycled materials is not only low but eco-friendly. The TENG performance as a function of the concentration of SMPs is investigated and compared with the composite's work-function and surface-potentials, with the distance-dependent electric field theoretical model employed to optimize the performance. Consequently, the optimized TENG exhibits maximum output voltage, current, charge, and power density of ∼280 V, 17.3 μA, 32.5 nC, and 14.4 W·m−2, respectively, creating a highly competitive energy harvester that can conform to the rigorous needs of wearables and mobile applications. Furthermore, the fully packaged silicone rubber device protects it from humidity and enables the device utility for practical applications with a soft, comfortable, and skin-friendly interface.
Triboelectric nanogenerators (TENGs) developed using eco-friendly natural materials instead of traditional electronic materials are more favorable for biocompatible applications, as well as from a sustainable life-cycle analysis perspective. Microarchitectured silkworm fibroin films with high surface roughness and an outstanding ability to lose electrons are used to design TENGs. An alcohol-annealing treatment is utilized to strengthen the resistance of the silk film (SF) against humidity and aqueous solubility. Herein, for the first time, the distance-dependent electric field theoretical model is employed to optimize the TENG parameters to achieve high output, which shows excellent agreement with the experimental outputs of SF-based TENG. The alcohol-treated microarchitectured SF (AT-MASF) with a polytetrafluoroethylene positive contact exhibits a stable and high electrical output even in harsh environments. These studies can lead us closer to the attractive future vision of realizing biodegradable TENG systems for harness/sensing various biomechanical activities even under real/humid environments. The potential and real-time application of the proposed AT-MASF-based TENG is demonstrated by directly employing its electric power to drive a number of low-power portable electronics and for sensing in human-body centric activities.
- H. Patnam, B. Dudem, et al., High-performance and robust triboelectric nanogenerators based on optimal microstructured poly (vinyl alcohol) and poly (vinylidene fluoride) polymers for self-powered electronic applications. Energy, 2021, 223, 120031.
- P. Manchi, S.A. Graham, B. Dudem, et al., Improved performance of nanogenerator via synergetic piezo/triboelectric effects of lithium niobate microparticles embedded composite films. Composite Science & Technology, 2021, 201, 108540.
- S.A. Graham, B. Dudem, et al., Integrated Design of Highly Porous Cellulose-Loaded Polymer-Based Triboelectric Films toward Flexible, Humidity-Resistant, and Sustainable Mechanical Energy Harvesters. ACS Energy Letters, 2020, 5, 2140.
- H. Patnam, B. Dudem, et al., Piezo/triboelectric hybrid nanogenerators based on Ca-doped barium zirconate titanate embedded composite polymers for wearable electronics. Composite Science & Technology, 2020, 188, 107693.
- B. Dudem, et al., Wearable and durable triboelectric nanogenerators via polyaniline coated cotton textiles as a movement sensor and self-powered system. Nano Energy, 2019, 55, 305.
- A.R. Mule†, B. Dudem†, et al., Humidity Sustained Wearable Pouch‐Type Triboelectric Nanogenerator for Harvesting Mechanical Energy from Human Activities. Advanced Functional Materials, 2019, 29, 1807779. [†Equally Contributed]
- S.A. Graham, B. Dudem, et al., Engineering squandered cotton into eco-benign microarchitectured triboelectric films for sustainable and highly efficient mechanical energy harvesting. Nano Energy, 2019, 61, 505.
- B. Dudem, et al., High-Efficiency and Thermally Sustainable Perovskite Solar Cells with Sandpaper-Aided Flexible Haze/Antireflective Films. ACS Sustainable Chemistry & Engineering, 2019, 7, 12981.
- A.R. Mule, B. Dudem, et al., Wearable Single-Electrode-Mode Triboelectric Nanogenerator via Conductive Polymer-Coated Textiles for Self-Power Electronics. ACS Sustainable Chemistry & Engineering, 2019, 7, 16450.
- Sk.K. Hussain, B. Dudem, et al., Enhanced electrochemical performance via PPy encapsulated 3D flower-like bismuth molybdate nanoplates for high-performance supercapacitors. Applied Surface Science, 2019, 478, 846.
- B. Dudem, et al., Improved Light Harvesting Efficiency of Semitransparent Organic Solar Cells Enabled by Broadband/Omnidirectional Subwavelength Antireflective Architectures. Journal of Materials Chemistry A, 2018, 6, 14769.
- B. Dudem, et al., Enhancing the output performance of hybrid nanogenerators based on Al-doped BaTiO3 composite films: A self-powered utility system for portable electronics. Journal of Materials Chemistry A, 2018, 6, 16101.
- B. Dudem, et al., Triboelectric nanogenerators with gold-thin-film-coated conductive textile as floating electrode for scavenging wind energy. Nano Research, 2018, 11, 101.
- B. Dudem, et al., Enhanced Performance of Microarchitectured PTFE-Based Triboelectric Nanogenerator via Simple Thermal Imprinting Lithography for Self-Powered Electronics. ACS Applied Materials & Interfaces, 2018, 10, 24181.
- B. Dudem, et al., Highly-flexible piezoelectric nanogenerators with silver nanowires and barium titanate embedded composite films for mechanical energy harvesting. Applied Energy, 2018, 230, 865.
- D.H. Kim, B. Dudem, et al., Boosting light harvesting in perovskite solar cells by biomimetic inverted hemispherical architectured polymer layer with high haze factor as an antireflective layer. ACS Applied Materials & Interfaces, 2018, 10, 13113.
- B. Dudem, et al., Hierarchical Ag/TiO2/Si Forest-Like Nano/Micro-Architectures as Antireflective, Plasmonic Photocatalytic, and Self-Cleaning Coatings. ACS Sustainable Chemistry & Engineering, 2018, 6, 1580.
- D.H. Kim†, B. Dudem†, et al.,High-performance flexible piezoelectric-assisted triboelectric hybrid nanogenerator via polydimethylsiloxane-encapsulated nanoflower-like ZnO composite films for scavenging energy from daily human activities. ACS Sustainable Chemistry & Engineering, 2018, 6, 8525.
- A.R. Mule, B. Dudem, et al., High-performance and cost-effective triboelectric nanogenerators by sandpaper-assisted micropatterned polytetrafluoroethylene. Energy, 2018, 165, 677.
- D.H. Kim, B. Dudem, et al., Acid-free approach towards the growth of vertically aligned TiO2 nanorods as an efficient photoanode for dye-sensitized solar cells. Materials Research Bulletin, 2018, 105, 202.
- B. Dudem, et al., Nanopillar-array architectured PDMS-based triboelectric nanogenerator integrated with a windmill model for effective wind energy harvesting. Nano Energy, 2017, 42, 269.
- J.W. Leem, B. Dudem, et al., Biomimetic nano/micro double-textured silicon with outstanding antireflective and super-hydrophilic surfaces for high optical performance. RSC Advances, 2017, 7, 33757.
- B. Dudem, et al., CH3 NH3 PbI3 planar perovskite solar cells with antireflection and self-cleaning function layers. Journal of Materials Chemistry A, 2016, 4, 7573.
- B. Dudem, et al., Hybrid energy cell with hierarchical nano/micro-architectured polymer film to harvest mechanical, solar, and wind energies individually/simultaneously. ACS Applied Materials & Interfaces, 2016, 8, 30165.
- B. Dudem, et al., A multifunctional hierarchical nano/micro-structured silicon surface with omnidirectional antireflection and superhydrophilicity via an anodic aluminum oxide etch mask. RSC Advances, 2016, 6, 3764.
- J.W. Leem, B. Dudem, et al., Thermal-tolerant polymers with antireflective and hydrophobic grooved subwavelength grating surfaces for high-performance optics. RSC Advances, 2016, 6, 79755.
- J.W. Leem, M. Choi, B. Dudem, et al., Hierarchical structured polymers for light-absorption enhancement of silicon-based solar power systems. RSC Advances, 2016, 6, 55159.
- S.H. Kim, S.H. Lee, B. Dudem, et al., Fabrication and optical characterization of hybrid antireflective structures with zinc oxide nanorods/micro pyramidal silicon for photovoltaic applications. Optical Materials Express, 2016, 6, 4000.
- B. Dudem, et al., Highly transparent and flexible triboelectric nanogenerators with subwavelength-architectured polydimethylsiloxane by a nanoporous anodic aluminum oxide template. ACS Applied Materials & Interfaces, 2015, 7, 20520.
- B. Dudem, et al., Multifunctional polymers with biomimetic compound architectures via nanoporous AAO films for efficient solar energy harvesting in dye-sensitized solar cells. RSC Advances, 2015, 5, 90103.
- C.V. Reddy, C. Byon, B. Narendra, B. Dudem, et al., Effect of calcination temperature on cobalt substituted cadmium ferrite nanoparticles. Journal of Materials Science: Materials in Electronics, 2015, 26, 5078.
- C.V. Reddy, C. Byon, B. Narendra, D. Baskar, et al., Investigation of structural, thermal and magnetic properties of cadmium substituted cobalt ferrite nanoparticles. Superlattices and Microstructures, 2015, 82, 165.
- B. Dudem, et al., Broadband and wide-angle antireflective characteristics of nanoporous anodic alumina films for silicon-based optoelectronic applications. Applied Physics B: Lasers & Optics, 2015, 118, 439.