Metallization of leaf-derived lignocellulose scaffolds for highperformance flexible electronics and oligodynamic disinfection  

作　　者：Rakesh Rajendran Nair Mihai Nita-Lazar Valeriu Robert Badescu Cristina Iftode Jakob Wolansky Tobias Antrack Hans Kleemann Karl Leo 

机构地区：[1]Dresden Integrated Center for Applied Physics and Photonic Materials(IAPP)and Institute for Applied Physics(IAP),Technische Universitat Dresden,Dresden,Germany [2]National Research and Development Institute for Industrial Ecology-ECOIND,Bucharest,Romania

出　　处：《npj Flexible Electronics》2024年第1期215-222,共8页npj-柔性电子(英文)

摘　　要：Vascular tubules in natural leaves form quasi-fractal networks that can be metallized.Traditional metallization techniques for these lignocellulose structures are complex,involving metal sputtering,nanoparticle solutions,or multiple chemical pretreatments.Here we present a novel,facile,and reliable method for metallizing leaf-derived lignocellulose scaffolds using silver microparticles.The method achieves properties on-par with the state-of-the-art,such as broadband optical transmittance of over 80%,sheet resistances below 1Ω/sq.,and a current-carrying capacity exceeding 6 A over a 2.5×2.5 cm^(2) quasi-fractal electrode.We also demonstrate copper electrodeposition as a costeffective approach towards fabricating such conductive,biomimetic quasi-fractals.Additionally,we show that these metallized structures can effectively eliminate pathogenic microorganisms like fecal coliforms and E.coli,which are bacterial indicators of microbiological contamination of water.We finally show that these oligodynamic properties can be significantly enhanced with a small externally applied voltage,indicating the noteworthy potential of such structures for water purification and pollution control.

关 键 词：CELLULOSE FRACTAL dynamic 

分 类 号：O62[理学—有机化学]