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Using reduced sericin as a green resist for precise pattern fabrication via water-based lithography.
J Colloid Interface Sci
December 2024
Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an, University of Technology, Xi'an 710048, PR China.
The use of toxic resists and complex procedures has impeded the resolution and quality of micro/nanofabrication on virtually arbitrary substrates via photolithography. To fabricate a precise and high-resolution pattern, a sericin nanofilm-based coating was developed by reducing disulfide bonds and subsequently assembling sericin protein. Upon exposure to ultraviolet (UV) light, intermolecular amide bonds in sericin are cleaved through the action of a reducing agent, allowing the reduced sericin (rSer) coating to exhibit the functional ability to generate diverse geometric micro/nanopatterns through photomask-governed photolithography.
View Article and Find Full Text PDFAnisotropic patterns of nanospikes induces anti-biofouling and mechano-bactericidal effects of titanium nanosurfaces with electrical cue.
Mater Today Bio
December 2024
Department of Microbiology, Tokyo Dental College, Tokyo, 101-0061, Japan.
Anti-microbial nanopatterns have attracted considerable attention; however, its principle is not yet fully understood, particularly for inorganic nanopatterns. Titanium nanosurfaces with dense and anisotropically patterned nanospikes regulate biological functions with multiple physical stimulations, which may be because of the nanopattern-induced alternation of surface physical properties. This study aimed to determine the antimicrobial capability of titanium nanosurfaces and their mechanisms.
View Article and Find Full Text PDFColor-tunable micro-scale light-emitting diodes (Micro-LEDs) can achieve full-color display in a simple and low-cost way. In this paper, we demonstrate growth of three-dimensional (3D) inverted pyramid GaN on nano-patterned sapphire substrates (NPSS). By using the sputtered AlN nucleation layer, the uniformity of the inverted pyramid has been improved to a large extent.
View Article and Find Full Text PDFAluminium surface work hardening enables multi-scale 3D lithography.
Nat Mater
January 2025
Research Centre for Industries of the Future (RCIF), School of Engineering, Westlake University, Hangzhou, China.
Multi-scale structures are ubiquitous in biological systems. However, manufacturing man-made structures with controllable features spanning multiple length scales, particularly down to nanoscale features, is very challenging, which seriously impacts their collective properties. Here we introduce an aluminium-based three-dimensional lithography that combines sequential nano-micro-macro-imprinting and anodization of multi-scale anodic aluminium oxide templates to manufacture well-defined multi-scale structures, using various materials.
View Article and Find Full Text PDFNanoengineering Spikey Surfaces: Investigation of Reversible Organizational Control of Surface-Tethered Polypeptide Brushes.
Langmuir
November 2024
Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States.
Nature serves as an important source of inspiration for the innovation and development of micro- and nanostructures for advanced functional surfaces and substrates. One example used in nature is a spikey surface ranging from micrometer-sized spikes on pollen grains down to the nanometer-scale protein spikes found on viruses. This study explored the realization of such highly textured surfaces via the nanoengineering of self-assembled poly(γ-benzyl-l-glutamate) "nanospikes", exploiting solvent-induced chain organization, controlled surface chemical functionality, and enhanced stability in the form of polymer brushes.
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