Growth of Hydrophilic CuS Nanowires via DNA‐Mediated Self‐Assembly Process and Their Use in Fabricating Smart Hybrid Films for Adjustable Chemical Release

Abstract

Facile growth of CuS nanowires through self-assembly and their application as building blocks for near-infrared light-responsive functional films have been demonstrated. It is found that DNA is a key factor in preparing the CuS material with defined nanostructure. An exclusive oriented self-aggregate growth mechanism is proposed for the growth of the nanowires, which might have important implications for preparing advanced, sophisticated nanostructures based on DNA nanotechnology. By employing the hydrophilic CuS nanowire as an optical absorber and thermosensitive nanogel as guest reservoir inside alginate film, a new platform for the release of functional molecules has been set up. In vitro studies have shown that the hybrid film possesses excellent biocompatibility and the release rate of chemical molecules from the film could be controlled with high spatial and temporal precision. Our novel approach and the resulting outstanding combination of properties may advance both the fields of DNA nanotechnology and light-responsive devices.

Toward Visualizing Genomic DNA Using Electron Microscopy via DNA Metallization

“…First, metallic nanoparticles and ions can bind to DNA through electrostatic interactions. [80,81] Once metal ions bind to DNA templates, they can be reduced for nanowire growth on DNA templates in several ways: chemical reduction, [82] electrochemical reductions, [64,83] photoreductions, [84] reductions by heating, [85] and other methods. [60,86] Second, DNA bases chemically modified with reducing groups, such as aldehydes [87] and sugars, [78,88] can also be used to reduce metal ions for the deposition of metal nanoparticles on DNA templates, which, in turn, serve as seeds for further nanowire growth.…”

Colorless Silk/Copper Sulfide Hybrid Fiber and Fabric with Spontaneous Heating Property under Sunlight

“…However, CuS nanoparticles (CuS NPs) have the same high surface energy as other inorganic nanoparticles; hence, it is difficult to blend them with RSF solution directly because they lack the affinity with RSF. Inspired by in situ preparation of CuS NPs with biopolymers (cellulose, chitosan, DNA, and starch) as stabilizer − and our previous study on the interaction between copper ions and silk fibroin, − herein, a practical method has been developed to in situ grow CuS NPs in the RSF solution. These CuS NPs in RSF solution can be readily mixed with RSF spinning dope to produce RSF/CuS hybrid fibers.…”

Oriented attachment growth of monocrystalline cuprous oxide nanowires in pure water

“…23 Many studies have shown that ligands have a strong inuence on the crystal growth process, like some organic molecules [24][25][26] and DNA. 27,28 In these studies, the OA process is mostly reported occurring in chemical solutions, but the OA process in pure water has not been well studied.…”