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Construction of Double-layered DNA Tiles and Arrays from Double Crossover Motifs.
Chembiochem
January 2025
State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, P. R. China E-amil.
DNA double crossover (DX) motifs including DAE (double crossover, antiparallel, even spacing) and DAO (double crossover, antiparallel, odd spacing) are well-known monolayered DNA building blocks for construction of 2D DNA arrays and tubes in nanoscale and microscale. Compared to the 3D architectures of DNA origami and single-stranded DNA bricks to build nanoscale 3D bundles, tessellations, gears, castles, etc., designs of double- and multi-layers of DX motifs for 3D architectures are still limited.
View Article and Find Full Text PDFCsPbBr3 Superstructures with Circularly Polarized Photoluminescence Obtained by the Self-Assembly and Annealing of Nanoclusters.
Angew Chem Int Ed Engl
January 2025
Zhengzhou University, College of Chemistry and Molecular Engineering, No.100 Science Avenue, Zhengzhou City, Henan Province P.R.China., Zhengzhou, Henan, CHINA.
We report a two-step approach to fabricate CsPbBr3 superstructures with strongly circularly polarized photoluminescence by self-assembly of nanoclusters on a substrate, followed by their annealing. In the first step, the nanoclusters self-assemble upon solvent evaporation, a process that forms mesoscopic superstructures whose geometrical arrangement at the µm-scale confers them optical chirality. In the second step, mild annealing of such superstructures induces the coalescence of the nanoclusters, accompanied by a continuous red shift of the photoluminescence up to 530 nm, with preservation of the µm-scale wires bundles and the chiral properties of the sample (glum = 0.
View Article and Find Full Text PDFSynthetic chitin oligosaccharide nanocrystals and their higher-order assemblies.
Chem Sci
December 2024
Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces Am Mühlenberg 1 Potsdam 14476 Germany
Self-assembly is a powerful strategy for creating complex architectures and elucidating the aggregation behaviors of biopolymers. Herein, we investigate the hierarchical assembly of chitin using a approach based on synthetic oligosaccharides. We discovered that chitin oligosaccharides self-assemble into platelets, which then form higher-order structures.
View Article and Find Full Text PDFChiroptical properties of cyanine aggregates: hierarchical modelling from monomers to bundles.
Chem Sci
September 2024
Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Università di Parma Parco Area delle Scienze 17A Parma 43124 Italy
Some achiral cyanine dyes form well-ordered chiral assemblies exhibiting pronounced Circular Dichroism (CD) and Circularly Polarized Luminescence (CPL). Notably, achiral C8O3 cyanines self-assemble into tubular J-aggregates, which further organize into bundles displaying bisignate CD spectrum - hallmark of an exciton coupled system - and an unusual bisignated CPL. In contrast, the tubular aggregates display a monosignate CD spectrum.
View Article and Find Full Text PDFClick-Chemistry-Enabled Functionalization of Cellulose Nanocrystals with Single-Stranded DNA for Directed Assembly.
ACS Biomater Sci Eng
October 2024
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.
Controlling the self-assembly of cellulose nanocrystals (CNCs) requires precise control over their surface chemistry for the directed assembly of advanced nanocomposites with tailored mechanical, thermal, and optical properties. In this work, in contrast to traditional chemistries, we conducted highly selective click-chemistry functionalization of cellulose nanocrystals with complementary DNA strands via a three-step hybridization-guided process. By grafting terminally functionalized oligonucleotides through copper-free click chemistry, we successfully facilitated the assembly of brushlike DNA-modified CNCs into bundled nanostructures with distinct chiral optical dichroism in thin films.
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