Nanotextured Tribonegative PTFE-SiO₂ Submicron Fibers for Self-Cleanable and Highly Flexible Kinetic Energy Harvester

Abstract

The triboelectric nanogenerator (TENG) has emerged as a promising renewable energy technology for harvesting kinetic energy from natural sources, such as human motion and rainfall. In this study, we fabricate a mechanically robust, porous, and superhydrophobic PTFE-SiO₂ nanofiber (NF)-based TENG using a facile electrohydrodynamic spinning technique, i.e., electrospinning method. The incorporation of SiO₂ nanoparticles (NPs) into the PTFE NF matrix significantly enhances the output performance, energy-harvesting efficiency, and superhydrophobic characteristics of the PTFE-SiO₂ NF-based TENG. The optimized PTFE-SiO₂ NF-based TENG achieves a maximum energy-harvesting efficiency of 102 mW·N⁻¹·m⁻², outperforming previously reported NF-based TENGs. Moreover, it successfully harvests kinetic energy from multiple natural stimuli, generating 429 μW from human interaction and 1.65 μW from water droplets. These results demonstrate the potential of PTFE-SiO₂ NF-based TENG for integration into self-powered wearable electronics and environmental energy-harvesting systems for their autonomous operation without reliance on external power sources.

Graphical abstract

Keywords

Triboelectric nanogenerator / Kinetic energy-harvesting / Superhydrophobicity / Electrospinning / PTFE-SiO₂ nanofiber mat

References

[1] Kang M, Yum HY, Kim HT, Park BJ, Cho DS, Choi Y, Kim HJ, Cho Y, Kim YJ, Lee DM, Lee DG, Song HC, Nam SH, Lee JH, Choi BO, Kim SW. Self-powered electrical bandage based on body-coupled energy harvesting. Adv Mater, 2024, 36: 2402491

[2] Fan X, Ke T, Gu H. Multifunctional, ultra-tough organohydrogel E-skin reinforced by hierarchical goatskin fibers skeleton for energy harvesting and self-powered monitoring. Adv Funct Mater, 2023, 33: 2304015

[3] Veenuttranon K, Kaewpradub K, Jeerapan I. Screen-printable functional nanomaterials for flexible and wearable single-enzyme-based energy-harvesting and self-powered biosensing devices. Nano-Micro Lett, 2023, 15: 85

[4] Khumngern S, Jeerapan I. Synergistic convergence of materials and enzymes for biosensing and self-sustaining energy devices towards on-body health monitoring. Commun Mater, 2024, 5: 135

[5] Song KY, Kim SW, Nguyen DC, Park JY, Luu TT, Choi D, Baik JM, An S. Recent progress on nature-derived biomaterials for eco-friendly triboelectric nanogenerators. EcoMat, 2023, 5: e12357

[6] Park D, Hong JH, Choi D, Kim D, Jung WH, Yoon SS, Kim KH, An S. Biocompatible and mechanically-reinforced tribopositive nanofiber mat for wearable and antifungal human kinetic-energy harvester based on wood-derived natural product. Nano Energy, 2022, 96: 107091

[7] Cao X, Xiong Y, Sun J, Xie X, Sun Q, Wang ZL. Multidiscipline applications of triboelectric nanogenerators for the intelligent era of internet of things. Nano Micro Lett, 2023, 15: 14

[8] Jo H, Park D, Joo M, Choi D, Kang J, Ha JM, Kim KH, Kim KH, An S. Performance-enhanced eco-friendly triboelectric nanogenerator via wettability manipulation of lignin. EcoMat, 2023, 5: e12413

[9] Lu P, Liao X, Guo X, Cai C, Liu Y, Chi M, Du G, Wei Z, Meng X, Nie S. Gel-based triboelectric nanogenerators for flexible sensing: principles, properties, and applications. Nano Micro Lett, 2024, 16: 206

[10] Hasan MAM, Zhu W, Bowen CR, Wang ZL. Triboelectric nanogenerators for wind energy harvesting. Nat Rev Electr Eng, 2024, 1: 453

[11] Qiu H, Wang H, Xu L, Zheng M, Wang ZL. Brownian motor inspired monodirectional continuous spinning triboelectric nanogenerators for extracting energy from irregular gentle water waves. Energy Environ Sci, 2023, 16: 473

[12] Han J, Li J, Zhang X, Zhao L, Wang C. Enhancing the performance of triboelectric nanogenerator via chitosan films surface modification. Chem Eng J, 2024, 489: 151493

[13] Meng H, Zhang J, Zhu R, Wang J, Ge Y, Liu H, Feng C, Zhou Z, Meng Y, Huang Z. Elevating outputs of droplet triboelectric nanogenerator through strategic surface molecular engineering. ACS Energy Lett, 2024, 9: 2670

[14] Li X, Xu L, Lin P, Yang X, Wang H, Qin H, Wang ZL. Three-dimensional chiral networks of triboelectric nanogenerators inspired by metamaterial’s structure. Energy Environ Sci, 2023, 16: 3040

[15] Yang C, Wang Y, Wang Y, Zhao Z, Zhang L, Chen H. Highly stretchable PTFE particle enhanced triboelectric nanogenerator for droplet energy harvestings. Nano Energy, 2023, 118: 109000

[16] Gao Y, Liu J, Zhou L, He L, Liu D, Yang P, Jin B, Wang ZL. Achieving high-performance triboelectric nanogenerators simultaneously with high-voltage and high-charge energy cycle. Energy Environ Sci, 2024, 17: 8734

[17] Jo E, Kim H, Park YJ, Park H, Lee M. Characterization of corona discharge treatment on PTFE surface for TENG applications. J Electrostat, 2023, 126: 103865

[18] Ahmed AA, Qahtan TF, Afzal N, Rashid M, Thalluri LN, Mohamed Ali MS. Low-pressure air plasma-treated polytetrafluoroethylene surface for efficient triboelectric nanogenerator. Mater Today Sustain, 2023, 21: 100330

[19] Li J, Zhong Q, Yao Y, Bi S, Zhou T, Guo X, Wu M, Feng T, Xiang R. Electrochemical performance and thermal stability of the electrospun PTFE nanofiber separator for lithium-ion batteries. J Appl Polym Sci, 2018, 135: 46508

[20] Hwang CK, Lee KA, Lee J, Kim Y, Ahn H, Hwang W, Ju BK, Kim JY, Yeo SY, Choi J, Sung YE, Kim ID, Yoon KR. Perpendicularly stacked array of PTFE nanofibers as a reinforcement for highly durable composite membrane in proton exchange membrane fuel cells. Nano Energy, 2022, 101: 107581

[21] Zhao P, Soin N, Prashanthi K, Chen J, Dong S, Zhou E, Zhu Z, Narasimulu AA, Montemagno CD, Yu L, Luo J. Emulsion electrospinning of polytetrafluoroethylene (PTFE) nanofibrous membranes for high-performance triboelectric nanogenerators. ACS Appl Mater Interfaces, 2018, 10: 5880

[22] Lin S, Cheng Y, Mo X, Chen S, Xu Z, Zhou B, Zhou H, Hu B, Zhou J. Electrospun polytetrafluoroethylene nanofibrous membrane for high-performance self-powered sensors. Nanoscale Res Lett, 2019, 14: 251

[23] Zou F, Li G, Wang X, Yarin AL. Dynamic hydrophobicity of superhydrophobic PTFE–SiO₂ electrospun fibrous membranes. J Membr Sci, 2021, 619: 118810

[24] Sun C, Zu G, Wei Y, Song X, Yang X. Flexible triboelectric nanogenerator based on electrospun poly(vinylidene fluoride) with MoS2/Carbon nanotube composite nanofibers. Langmuir, 2022, 28: 1479-1487

[25] Kumar S, Jha RK, Thakur B, Biswas T, Anad JK, Soren C, Banswar D, Singh S, Singh S, Sinha-Ray S, Goswani A. Performance enhancement of triboelectric nanogenerators and exploration of tactile sensing using an electrospun PAN-MWCNT layer through interface manipulation. J Mater Chem A, 2025, 13: 776-7803

[26] Kochakkadan ST, Duque M, Murillo G, Nirwan VP, Fahmi A. Sustainable electrospun hybrid nanofibers for triboelectric nanogenerators. Small, 2025, 21: 2410271

[27] Venkatesan M, Chandrasekar J, Hsu YC, Sun TW, Li PY, King XT, Chung MA, Chung RJ, Lee WY, Ye Z, Lin JH, Kuo CC. Rationally improved surface charge density of triboelectric nanogenerator with TiO₂-MXene/Polystyrene nanofiber charge trapping layer for biomechanical sensing and wound healing application. Adv Sci, 2024, 11: 2404019

[28] Liu Z, Muhammad M, Cheng L, Xie E, Han W. Improved output performance of triboelectric nanogenerators based on polydimethylsiloxane composites by the capacitive effect of embedded carbon nanotubes. Appl Phys Lett, 2020, 117: 143903

[29] Liu Z, Wang K, Jiang X, Javed MS, Han W. Overcoming current leaks in CNT/PDMS triboelectric composites by wrapping CNTs with TiO2 insulation layer. Appl Phys Lett, 2022, 121: 113902

[30] Samsudin EM, Hamid SBA. Effect of band gap engineering in anionic-doped TiO2 photocatalyst. Appl Surf Sci, 2017, 391: 326-336

[31] Green AE. Hypo-elasticity and plasticity. Proc R Soc Lond A, 1956, 234: 1196

[32] Zhang W, Staszel C, Yarin AL, Shim E, Pourdeyhimi B. Point-bonded polymer nonwovens and their rupture in stretching. Polymer, 2018, 146: 209

[33] An S, Yarin AL. Mechanical behavior of sintered submicron glass fiber mats. Int J Mech Sci, 2020, 170: 105354

[34] Yarin AL, Pourdeyhimi B, Ramakrishna S. Fundamentals and applications of micro- and nanofibers, 2014, Cambridge, Cambridge University Press

[35] Xu C, Zi Y, Wang A, Zou H, Dai Y, He X, Wang P, Wang Y, Feng P, Li D, Wang ZL. On the electron-transfer mechanism in the contact-electrification effect. Adv Mater, 2018, 30: 1706790

[36] Wang J, Wen Z, Zi Y, Lin L, Wu C, Guo H, Xi Y, Xu Y, Wang ZL. Self-powered electrochemical synthesis of polypyrrole from the pulsed output of a triboelectric nanogenerator as a sustainable energy system. Adv Funct Mater, 2016, 26: 3542

[37] Wang J, Wen Z, Zi Y, Zhou P, Lin J, Guo H, Xu Y, Wang ZL. All-plastic-materials based self-charging power system composed of triboelectric nanogenerators and supercapacitors. Adv Funct Mater, 2016, 26: 1070

[38] An S, Sankaran A, Yarin AL. Natural biopolymer-based triboelectric nanogenerators via fast, facile, scalable solution blowing. ACS Appl Mater Interfaces, 2018, 10: 37749

[39] Kim WG, Kim DW, Tcho LW, Kim JK, Kim MS, Choi YK. Triboelectric nanogenerator: structure, mechanism, and applications. ACS Nano, 2021, 15: 258

[40] Alam SN, Shrivastava P, Shukla U, Garg K, Edara AC, Sahoo N. An introduction to triboelectric nanogenerators. Nano Struct Nano Objects, 2023, 34: 100980

[41] Yu Y, Li H, Zhang X, Gao Q, Yang B, Wang ZL, Cheng T. Substantially boosting performance of triboelectric nanogenerators via a triboelectricification enhancement effect. Joule, 2024, 8: 1855

[42] Diaz AF, Felix-Navarro RM. A semi-quantitative tribo-electric series for polymeric materials: the influence of chemical structure and properties. J Electrostat, 2004, 62: 277

[43] Wu C, Wang A, Ding W, Guo H, Wang ZL. Triboelectric nanogenerator: a foundation of the energy for the new era. Adv Energy Mater, 2019, 9: 1802906

[44] Pan S, Zhang Z. Triboelectric effect: a new perspective on electron transfer process. J Appl Phys, 2017, 122: 144302

[45] Zou H, Zhang Y, Guo L, Wang P, He X, Dai G, Zheng H, Chen C, Wang AC, Xu C, Wang ZL. Quantifying the triboelectric series. Nat Commun, 2019, 10: 1427

[46] Wang W, Zhang L, Wang H, Zhao Y, Cheng J, Meng J, Wang D, Liu Y. High-output single-electrode droplet triboelectric nanogenerator based on asymmetrical distribution electrostatic induction enhancement. Small, 2023, 19: 2301568

[47] Su C, Li Y, Cao H, Lu C, Li Y, Chang J, Duan F. Novel PTFE hollow fiber membrane fabricated by emulsion electrospinning and sintering for membrane distillation. J Membr Sci, 2019, 583: 200

[48] Lee MW, Yarin AL, An S, Yoon SS. Self-healing nanotextured vascular engineering materials, 2019, Cham, Springer

[49] Dong ZQ, Ma XH, Xu ZL, Gu ZY. Superhydrophobic modification of PVDF–SiO₂ electrospun nanofiber membranes for vacuum membrane distillation. RSC Adv, 2015, 5: 67962

[50] Liang YY, Ju JG, Deng NP, Zhou XH, Yan J, Kang WM, Cheng BW. Super-hydrophobic self-cleaning bead-like PTFE SiO₂ nanofiber membranes for waterproof-breathable applications. Appl Surf Sci, 2018, 442: 54

[51] Delgado AO, Rizzutto MA, Severin D, Seidl T, Neumann R, Trautmann C. Latent track radius of PTFE irradiated with high energy ion beam. Nucl Instrum Methods Phys Res B, 2012, 273: 55

[52] Xu H, Jin W, Wang F, Liu G, Li C, Wang J, Zhu H, Guo Y. Formation and characterization of polytetrafluoroethylene nanofiber membranes for high-efficiency fine particulate filtration. RSC Adv, 2019, 9: 13631

[53] Lebedev YA, Korolev YM, Polikarpov VM, Ignat’eva LN, Antipov EM. X-ray powder diffraction study of polytetrafluoroethylene. Crystallogr Rep, 2010, 55: 609

[54] Chiu J. Thermal analysis of high polymers: differential thermal analysis and dynamic electrothermal analysis. J Polym Sci Part C, 1965, 8: 27

[55] Sasse HE, Konig U. SiO diffusion during thermal decomposition of SiO₂. J Appl Phys, 1990, 67: 6194

[56] Dhanumalayan E, Joshi GM. Performance properties and applications of polytetrafluoroethylene (PTFE)—a review. Adv Compos Hybrid Mater, 2018, 1: 247

[57] Dhatarwal P, Sengwa RJ. Influence of solid polymer electrolyte preparation methods on the performance of (PEO–PMMA)-LiBF4 films for lithium-ion battery applications. Polym Bull, 2018, 75: 5645

[58] Li X, Liu H, Liu X, Fang N, Wang X, Wu J. Synthesis of bi-phase dispersible core–shell FeAu@ZnO magneto-opto-fluorescent nanoparticles. Sci Rep, 2015, 5: 16384

[59] Kumar KK, Ravi M, Pavani Y, Bhavani S, Sharma AK, Rao VVRN. Investigations on PEO/PVP/NaBr complexed polymer blend electrolytes for electrochemical cell applications. J Membr Sci, 2014, 454: 200

[60] Li L, Zi FT, Zheng YF. The characterization of fluorocarbon films on NiTi alloy by magnetron sputtering. Appl Surf Sci, 2008, 255: 432

[61] Norton MG, Jiang WB, Dickinson JT, Hipps KW. Pulsed laser ablation and deposition of fluorocarbon polymers. Appl Surf Sci, 1996, 96–98: 617

[62] Zhang XF, Dong XL, Huang H, Lv B, Zhu XG, Lei JP, Ma S, Liu W, Zhang ZD. Synthesis, structure and magnetic properties of SiO₂-coated Fe nanocapsules. Mater Sci Eng A, 2007, 454–455: 211

[63] Feng YS, Zhou SM, Li Y, Li CC, Zhang LD. Synthesis and characterization of tin oxide nanoparticles dispersed in monolithic mesoporous silica. Solid State Sci, 2003, 5: 729

[64] Wang N, Wang H, Ren J, Gao G, Chen S, Zhao G, Yang Y, Wang J. Novel additive of PTFE-SiO₂ core–shell nanoparticles with superior water lubricating properties. Mater Des, 2020, 195: 109069

[65] Lafuma A, Quéré D. Superhydrophobic states. Nat Mater, 2003, 2: 457

[66] Cassie ABD, Baxter S. Wettability of porous surfaces. Trans Faraday Soc, 1944, 40: 546

[67] Toh MJ, Oh PC, Chew TL, Ahmad AL. Antiwettability enhancement of PVDF-HFP membrane via superhydrophobic modification by SiO₂ nanoparticles. C R Chim, 2019, 22: 369

[68] Li JF, Guo SJ, Xu ZZ, Li JG, Pan ZH, Du ZP, Cheng FQ. Preparation of omniphobic PVDF membranes with silica nanoparticles for treating coking wastewater using direct contact membrane distillation: electrostatic adsorption vs. chemical bonding. J Membr Sci, 2019, 574: 349

[69] Tran PA, Webster TJ. Understanding the wetting properties of nanostructured selenium coatings: the role of nanostructured surface roughness and air-pocket formation. Int J Nanomed, 2013, 8: 2001

[70] Cho Y, Park CH. Objective quantification of surface roughness parameters affecting superhydrophobicity. RSC Adv, 2020, 10: 31251

[71] Salehabadi S, Seyfi J, Hejazi I, Davachi SM, Naeini AH, Khakbaz M. Nanosilica-decorated sponges for efficient oil/water separation: role of nanoparticles’ type and concentration. J Mater Sci, 2017, 52: 7017

[72] Avci MZ, Sarac AS. Transparent poly(methyl methacrylate-co-butyl acrylate) nanofibers. J Appl Polym Sci, 2013, 130: 4264

[73] Li WJ, Xiang YY, Zhang W, Loos K, Pei YT. Ordered mesoporous SiO₂ nanoparticles as charge storage sites for enhanced triboelectric nanogenerators. Nano Energy, 2023, 113: 108539

[74] Lee JH, Yu I, Hyun S, Kim JK, Jeong U. Remarkable increase in triboelectrification by enhancing the conformable contact and adhesion energy with a film-covered pillar structure. Nano Energy, 2017, 34: 233

[75] Chung CK, Ke KH. High contact surface area enhanced Al/PDMS triboelectric nanogenerator using novel overlapped microneedle arrays and its application to lighting and self-powered devices. Appl Surf Sci, 2020, 508: 145310

[76] Choi GR, Park J, Ha JW, Kim WD, Lim H. Superamphiphobic web of PTFEMA fibers via simple electrospinning without functionalization. Macromol Mater Eng, 2010, 295: 995

[77] Wang J, Li G, Xu S, Wu H, Fu S, Shan C, He W, Zhao Q, Li K, Hu C. Remarkably enhanced charge density of inorganic material via regulating contact barrier difference and charge trapping for triboelectric nanogenerator. Adv Funct Mater, 2023, 33: 2304221

[78] Wang C, Guo H, Wang P, Li J, Sun Y, Zhang D. An advanced strategy to enhance TENG output: reducing triboelectric charge decay. Adv Mater, 2023, 35: 2209895

[79] Wen X, Su Y, Yang Y, Zhang H, Wang ZL. Applicability of triboelectric generator over a wide range of temperature. Nano Energy, 2014, 4: 150

[80] Bui VT, Huynh ND, Chau NM, Kim W, Kim H, Oh IK, Huynh DP, Choi D. High-temperature operatable triboelectric nanogenerator using microdome-patterned polyimide for self-powered sensors. Nano Energy, 2022, 101: 107612

[81] McCarty L, Whitesides G. Electrostatic charging due to separation of ions at interfaces: Contact electrification of ionic electrets. Angew Chem Int Ed, 2008, 47: 2188

[82] Nguyen V, Yang R. Effect of humidity and pressure on the triboelectric nanogenerator. Nano Energy, 2013, 2: 604

[83] Guo Y, Wei X, Shu J, Liu B, Yin J, Guan C, Han Y, Gao S, Chen Q. Charge trapping at the MoS₂–SiO₂ interface and its effects on the characteristics of MoS₂ metal-oxide-semiconductor field effect transistors. Appl Phys Lett, 2015, 106: 103109

[84] Conley JF, Lenahan PM. Room temperature reactions involving silicon dangling bond centers and molecular hydrogen in amorphous SiO₂ thin films on silicon. Appl Phys Lett, 1993, 62: 40

[85] Niu SM, Wang SH, Lin L, Liu Y, Zhou YS, Hu YF, Wang ZL. Theoretical study of contact-mode triboelectric nanogenerators as effective power source. Energy Environ Sci, 2013, 6: 3576

[86] Yang B, Zeng W, Peng ZH, Liu SR, Chen K, Tao XM. A fully verified theoretical analysis of contact-mode triboelectric nanogenerators as a wearable power source. Adv Energy Mater, 2016, 6: 1600505

[87] Zhang J, Hu S, Shi Z, Wang Y, Lei Y, Han J, Xiong Y, Sun J, Zheng L, Sun Q, Yang G, Wang ZL. Eco-friendly and recyclable all-cellulose triboelectric nanogenerator and self-powered interactive interface. Nano Energy, 2021, 89: 106354

[88] Zhang H, Quan LW, Chen JK, Xu CK, Zhang CH, Dong SR, Lü CF, Luo JK. A general optimization approach for contact-separation triboelectric nanogenerator. Nano Energy, 2019, 56: 700

[89] Liu X, Yu A, Qin A, Zhai J. Highly integrated triboelectric nanogenerator for efficiently harvesting raindrop energy. Adv Mater Technol, 2019, 4: 1900608

[90] Lin ZH, Cheng G, Lee S, Pradel KC, Wang ZL. Harvesting water drop energy by a sequential contact-electrification and electrostatic-induction process. Adv Mater, 2014, 26: 4690

[91] Choi D, Lee H, Im DJ, Kang IS, Lim G, Kim DS, Kang KH. Spontaneous electrical charging of droplets by conventional pipetting. Sci Rep, 2013, 3: 2037

[92] Ravelo B, Duval F, Kane S, Nsom B. Demonstration of the triboelectricity effect by the flow of liquid water in the insulating pipe. J Electrostat, 2011, 69: 473

[93] Takahashi T. Measurement of electric charge of cloud droplets, drizzle, and raindrops. Rev Geophys, 1973, 11: 903

[94] Cheng G, Lin ZH, Du ZL, Wang ZL. Simultaneously harvesting electrostatic and mechanical energies from flowing water by a hybridized triboelectric nanogenerator. ACS Nano, 2014, 8: 1932

[95] Zheng L, Lin ZH, Cheng G, Wu WZ, Wen XN, Lee SM, Wang ZL. Silicon-based hybrid cell for harvesting solar energy and raindrop electrostatic energy. Nano Energy, 2014, 9: 291

[96] Im B, Lee SK, Kang G, Moon J, Byun D, Cho DH. Electrohydrodynamic jet printed silver-grid electrode for transparent raindrop energy-based triboelectric nanogenerator. Nano Energy, 2022, 95: 107049

[97] Ye CY, Liu D, Peng X, Jiang Y, Cheng RW, Ning CA, Sheng FF, Zhang YH, Dong K, Wang ZL. A hydrophobic self-repairing power textile for effective water droplet energy harvesting. ACS Nano, 2021, 15: 18172

[98] Clanet C, Beguin C, Richard D, Quere D. Maximal deformation of an impacting drop. J Fluid Mech, 2004, 517: 199

[99] Cho H, Chung J, Shin G, Sim JY, Kim DS, Lee S, Hwang W. Toward sustainable output generation of liquid-solid contact triboelectric nanogenerators: the role of hierarchical structures. Nano Energy, 2019, 56: 56

[100] Kim H, Lee C, Kim MH, Kim J. Drop impact characteristics and structure effects of hydrophobic surfaces with micro- and/or nanoscaled structures. Langmuir, 2012, 28: 11250

[101] Liu YH, Moevius L, Xu XP, Qian TZ, Yeomans JM, Wang ZK. Pancake bouncing on superhydrophobic surfaces. Nat Phys, 2014, 10: 515

[102] Tang CL, Qin MX, Weng XY, Zhang XH, Zhang P, Li JL, Huang ZH. Dynamics of droplet impact on solid surface with different roughness. Int J Multiphase Flow, 2017, 96: 56

[103] Bao Y, Wang Z, Shi Z, Gan Y. A modified Weber number capturing the bouncing-wetting transition of droplet impact on rough surfaces. Adv Mater Interfaces, 2023, 10: 2201873

[104] Liu Y, Liu YZ, Chen M. Maximum spreading diameter of bouncing droplets at ultralow Weber numbers. Langmuir, 2023, 39: 7922

[105] Wang X, Fang S, Tan J, Hu T, Chu W, Yin J, Zhou J, Guo W. Dynamics for droplet-based electricity generators. Nano Energy, 2021, 80: 105558

[106] Yun S, Cho S, Kim HW, Cho SB, Lee S, Yong K. Reversible switching performance of water droplet-driven triboelectric nanogenerators using a magnetocontrollable lubricant-infused surface for sustainable power generation. Nano Energy, 2022, 103: 107783

[107] Xing L, Zhang Q, Fu Q, Yu J, Huang X. Preparation and properties of polytetrafluoroethylene superhydrophobic surface. Colloid Surf A, 2023, 670: 131574

[108] Hussain MM, Majjed MK, Ma H, Wang Y, Adil S, Lotfi M. PTFE/EP reinforced MOF/SiO2 composite as a superior mechanically robust superhydrophobic agent towards corrosion protection, self-cleaning and anti-icing. Chem Eur J, 2022, 28: 202103220

[109] Zhu NX, Wei ZW, Chen CX, Wang D, Cao CC, Qiu QF, Jiang JJ, Wang HP, Su CY. Self-generation of surface roughness by low-surface-energy alkyl chains for highly stable superhydrophobic/superoleophilic MOFs with multiple functionalities. Angew Chem Int Ed, 2019, 58: 17033

Funding

National Research Foundation of Korea (NRF)(RS-2023-00211303)

Korea Institute for Advancement of Technology(RS-2023-KI002684)

RIGHTS & PERMISSIONS

Donghua University, Shanghai, China