Hierarchically patterned polyurethane microgrooves featuring nanopillars or nanoholes for neurite elongation and alignment

• Lester Uy Vinzons,
• Guo-Chung Dong and
• Shu-Ping Lin

Beilstein J. Nanotechnol. 2023, 14, 1157–1168, doi:10.3762/bjnano.14.96

• demonstrates a promising method for the creation of hierarchical nano-/microstructures on various polymers for nerve implant applications. Results and Discussion Fabrication and characterization of PU nanopillar and nanohole substrates We first fabricated nanopillar and nanohole arrays on medical-grade

• facilitates the creation of nano-/microstructures on substrates of different solvent-castable polymers without the use of expensive equipment. Moreover, the hierarchically patterned microgrooves featuring nanopillars and nanoholes provide an additional strategy for the enhancement of next-generation nerve

• the grooved PU substrates. (A) Preparation of SU-8 nanopillar/hole on microgroove master molds. (The step enclosed by the blue dashed box is the “photoresist reinforcement” step described in the main text.) (B) Replication of nano-/microstructures on PU. (C–E) Scanning electron micrographs of PU

Atmospheric water harvesting using functionalized carbon nanocones

• Fernanda R. Leivas and
• Marcia C. Barbosa

Beilstein J. Nanotechnol. 2023, 14, 1–10, doi:10.3762/bjnano.14.1

• ), which use hierarchical nano/microstructures to collect water. Some examples are the Trifolium pratense plant, the Cotula fallax cactus, and the Uloborus walckenaerius spider [14][15][16]. Usually, these biomimetic designs have an asymmetrical shape that energetically drives the directional transport of

Fabrication of nano/microstructures for SERS substrates using an electrochemical method

• Jingran Zhang,
• Tianqi Jia,
• Xiaoping Li,
• Junjie Yang,
• Zhengkai Li,
• Guangfeng Shi,
• Xinming Zhang and
• Zuobin Wang

Beilstein J. Nanotechnol. 2020, 11, 1568–1576, doi:10.3762/bjnano.11.139

• /nanopore; nano/microstructures; SERS substrate; Introduction Surface-enhanced Raman spectroscopy (SERS) can be used to detect biomolecules [1][2][3], explosives [4][5][6], and pesticide residues [7][8][9]. Plasmonic metal nanostructures are often used as SERS substrates to increase the molecule-specific

Nonclassical dynamic modeling of nano/microparticles during nanomanipulation processes

• Moharam Habibnejad Korayem,
• Ali Asghar Farid and
• Rouzbeh Nouhi Hefzabad

Beilstein J. Nanotechnol. 2020, 11, 147–166, doi:10.3762/bjnano.11.13

• and a molecular dynamics model for the nanoparticle. The results showed that the predicted changes in the nonclassical model are less than in the classical model [26]. The experimental studies indicate that size-dependent behavior plays a major role in nano/microstructures where the classical

Micro- and nano-surface structures based on vapor-deposited polymers

• Hsien-Yeh Chen

Beilstein J. Nanotechnol. 2017, 8, 1366–1374, doi:10.3762/bjnano.8.138

• attempted by direct electron beam (e-beam) lithography on vapor-deposited PPMA coatings, and 200 nm-sized features were obtained on the vapor-deposited poly(propargyl methacrylate) (PPMA) films [34]. Direct writing using a two-photon laser was also demonstrated on poly(p-xylylene) to fabricate 3D nano

• -/microstructures [35]. Similarly, direct writing using a scanning probe microscopy-based nanolithographic technique (dip-pen nanolithography, DPN) was used to deliver chemical substances with submicrometer features on a wide range of poly(p-xylylene) deposited substrates [36]. An array of micro-sized plasma was