Light-Responsive Colloidal Crystals Engineered with DNA.
Jinghan Zhu,Jinghan Zhu,Haixin Lin,Haixin Lin,Youngeun Kim,Youngeun Kim,Muwen Yang,Muwen Yang,Kacper Skakuj,Kacper Skakuj,Jingshan S. Du,Jingshan S. Du,Byeongdu Lee,George C. Schatz,George C. Schatz,Richard P. Van Duyne,Richard P. Van Duyne,Chad A. Mirkin,Chad A. Mirkin +18 more
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TLDR
A novel method for synthesizing and photopatterning colloidal crystals via light-responsive DNA via azobenzene-modified DNA is developed, and the size of the particles can be used to modulate the Tm window over which these structures are light- responsive.Abstract:
A novel method for synthesizing and photopatterning colloidal crystals via light-responsive DNA is developed. These crystals are composed of 10-30 nm gold nanoparticles interconnected with azobenzene-modified DNA strands. The photoisomerization of the azobenzene molecules leads to reversible assembly and disassembly of the base-centered cubic (bcc) and face-centered cubic (fcc) crystalline nanoparticle lattices. In addition, UV light is used as a trigger to selectively remove nanoparticles on centimeter-scale thin films of colloidal crystals, allowing them to be photopatterned into preconceived shapes. The design of the azobenzene-modified linking DNA is critical and involves complementary strands, with azobenzene moieties deliberately staggered between the bases that define the complementary code. This results in a tunable wavelength-dependent melting temperature (Tm ) window (4.5-15 °C) and one suitable for affecting the desired transformations. In addition to the isomeric state of the azobenzene groups, the size of the particles can be used to modulate the Tm window over which these structures are light-responsive.read more
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Colloidal Self-Assembly Approaches to Smart Nanostructured Materials.
TL;DR: In this article, a review of colloidal self-assembly of smart nanostructured materials is presented, with a specific focus on the structure-property correlation in smart materials and functional devices.
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Advances in Application of Azobenzene as a Trigger in Biomedicine: Molecular Design and Spontaneous Assembly.
TL;DR: Azobenzene is a well-known derivative of stimulus-responsive molecular switches and has shown superior performance as a functional material in biomedical applications as mentioned in this paper, and has been used as a hypoxia-sensitive connector via biological cleavage under appropriate stimulus conditions.
Journal ArticleDOI
4D Printing of Polymeric Materials: Techniques, Materials, and Prospects
Peng-Fe Fu,Hai-gui Li,Jin Gong,Zeng Fan,Andrew Smith,Kuangyu Shen,Haofei Huang,Xin Qian,Jeffrey R. McCutcheon,Luyi Sun +9 more
TL;DR: The challenges and future opportunities in 4D printing are also discussed in this article , where the authors present a review of important 4D-printing technologies in conjunction with the underlying polymer science and engineering.
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Synthesis, Assembly, Optical Properties, and Sensing Applications of Plasmonic Gap Nanostructures
Abstract: Plasmonic gap nanostructures (PGNs) have been extensively investigated mainly because of their strongly enhanced optical responses, which stem from the high intensity of the localized field in the nanogap. The recently developed methods for the preparation of versatile nanogap structures open new avenues for the exploration of unprecedented optical properties and development of sensing applications relying on the amplification of various optical signals. However, the reproducible and controlled preparation of highly uniform plasmonic nanogaps and the prediction, understanding, and control of their optical properties, especially for nanogaps in the nanometer or sub-nanometer range, remain challenging. This is because subtle changes in the nanogap significantly affect the plasmonic response and are of paramount importance to the desired optical performance and further applications. Here, recent advances in the synthesis, assembly, and fabrication strategies, prediction and control of optical properties, and sensing applications of PGNs are discussed, and perspectives toward addressing these challenging issues and the future research directions are presented.
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Out-of-Equilibrium Colloidal Assembly Driven by Chemical Reaction Networks.
TL;DR: Recent studies are discussed demonstrating that dissipative assembly is not limited to the molecular world but can also be translated to building blocks of colloidal dimensions, and how marrying nonequilibrium self-assembly with the functional properties associated with colloidal building blocks presents a promising route for the development of next-generation materials.
References
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