Journal Article

PUBDB-2025-04213

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Triboelectrification during non-wetting liquids intrusion–extrusion in hydrophobic nanoporous silicon monoliths

Bartolomé, L. (Corresponding author) ; Verziaggi, N. ; Brinker, M. ; Amayuelas, E. ; Merchori, S. ; Arkan, M. Z. ; Eglītis, R. ; Šutka, A. ; Chorążewski, M. ; Huber, P.Extern*DESY* ; Meloni, S. (Corresponding author) ; Grosu, Y. (Corresponding author)

2025
Elsevier Amsterdam [u.a.]

This record in other databases:    

Please use a persistent id in citations: doi:10.1016/j.nanoen.2025.111488  doi:10.3204/PUBDB-2025-04213

Abstract: Triboelectric nanogenerators (TENGs) have emerged as promising devices for converting mechanical energy intoelectrical energy through contact electrification and electrostatic induction. However, the generated energy,unlike instantaneous power, current and voltage, is rarely addressed in the vibrant research field of TENGs. Inthis study, we investigate Intrusion–Extrusion Triboelectric Nanogenerators (IE-TENGs) based on nanoporoussilicon monoliths and non-wetting liquids (i.e., water and a 1 mg/mL polyethylenimine solution), addressing theenergy generated during this process, conversion efficiency as well as the mechanism underlying the observedphenomena. Compared to powder-based IE-TENGs, the use of monolithic silicon structures enables more efficientand reproducible energy harvesting, with significant improvements in both instantaneous power density andenergy per cycle. We also analyzed the impact of compression rate and liquid properties on electrical output,showing that higher compression rates improve power generation, while modifying the liquid medium signifi-cantly improves conversion efficiency, reaching up to 9 %. Furthermore, through computational analysis, weidentify the crucial role of grafting defects on the generated triboelectric output. This work introduces a novelapproach to triboelectric energy harvesting by implementing a monolithic nanoporous architecture and offeringan alternative pathway for enhancing contact electrification via confined solid–liquid interfaces. These findingsprovide new insights into the triboelectric behavior of porous systems and pave the way for next-generation high-performance IE-TENGs, with potential applications in wearable electronics, environmental energy harvesting,and self-powered sensing systems.

Note: eutsche Forschungsgemeinschaft (DFG, German Research Foundation) as part of the Excellence Strategy of the Federal Government and the federal states – EXC 3120/1 – 533771286

---

Contributing Institute(s):

1. CIMMS-RA Center for integr. Multiscale M (CIMMS)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. EHAWEDRY - Energy harvesting via wetting/drying cycles with nanoporous electrodes (964524) (964524)
3. Electro-Intrusion - Simultaneous transformation of ambient heat and undesired vibrations into electricity via nanotriboelectrification during non-wetting liquid intrusion-extrusion into-from nanopores (101017858) (101017858)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2025

---

Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF >= 15 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---