1D nanocrystals with precisely controlled dimensions, compositions, and architectures

Abstract

The ability to synthesize a diverse spectrum of one-dimensional (1D) nanocrystals presents an enticing prospect for exploring nanoscale size- and shape-dependent properties. Here we report a general strategy to craft a variety of plain nanorods, core-shell nanorods, and nanotubes with precisely controlled dimensions and compositions by capitalizing on functional bottlebrush-like block copolymers with well-defined structures and narrow molecular weight distributions as nanoreactors. These cylindrical unimolecular nanoreactors enable a high degree of control over the size, shape, architecture, surface chemistry, and properties of 1D nanocrystals. We demonstrate the synthesis of metallic, ferroelectric, upconversion, semiconducting, and thermoelectric 1D nanocrystals, among others, as well as combinations thereof.

Metal–Organic Framework (MOF) Nanorods, Nanotubes, and Nanowires

“…[25][26][27] As aresult, ZIF-8 has been the prototypical material for constructing MOF nano-and superstructures. [31][32][33] On the other hand, 1D nanostructures with controllable morphologies and architectures are in general more difficult to achieve than their 0D counterparts, [34,35] and examples of 1D ZIF-8 structures are thus relatively scarce,w hich are mainly obtained through bottom-up solution synthesis templated by polymer [36,37] or inorganic [38][39][40] 1D nanostructures,as well as through top-down strategies including self-assembly of ZIF-8 nanocrystals under an external electric field [41] and electrospinning from polymer mixture solutions. [31][32][33] On the other hand, 1D nanostructures with controllable morphologies and architectures are in general more difficult to achieve than their 0D counterparts, [34,35] and examples of 1D ZIF-8 structures are thus relatively scarce,w hich are mainly obtained through bottom-up solution synthesis templated by polymer [36,37] or inorganic [38][39][40] 1D nanostructures,as well as through top-down strategies including self-assembly of ZIF-8 nanocrystals under an external electric field [41] and electrospinning from polymer mixture solutions.…”

Polymer‐Templated Formation of Polydopamine‐Coated SnO2 Nanocrystals: Anodes for Cyclable Lithium‐Ion Batteries

“…5nm) decorated along a"cob" was crafted as an electrode.Specifically,PDA-coated SnO 2 was created with the aid of ah ydrophilic bottlebrushlike hydroxypropyl cellulose-graft-poly(acrylic acid) template (denoted HPC-g-PAA), as depicted by Figure 1. Thei nstantly formed SnO 2 nanoparticles were quickly bonded to PA Ab locks of HPC-g-PAA because of the strong coordinative interaction between the -COOH groups of PA Ab locks and SnO 2 nanoparticles, [13] yielding an ano-structure resembling ac orn-on-the-cob.F inally,e ach SnO 2 nanoparticle was coated with at hin layer of PDAb ys imple polymerization of dopamine, [14] forming PDA-coated SnO 2 nanocrystals (lower right panel in Figure 1). Then early 100 %e sterification efficiency (Supporting Information, Figure S1) indicates that all hydroxyl groups on HPC were converted into active Br-terminated groups.T he poly(tert-butyl acrylate) (PtBA)b locks were then grafted onto HPC-Br by atom transfer radical polymerization (ATRP), yielding HPC-g-PtBA.T he hydrolysis of PtBA into PA Ap roduced hydrophilic bottlebrush-like HPC-g-PAA, which served as the template for growing SnO 2 nanocrystals.…”

Resolving Optical and Catalytic Activities in Thermoresponsive Nanoparticles by Permanent Ligation with Temperature‐Sensitive Polymers

“…Notably,s trong coordination between carboxylic acid groups of inner PA Achains and the metal moieties of Au precursors in conjunction with the stable,spherical structure of unimolecular micelles render the preferential partition of abundant precursors in the compartment occupied by PA Achains, [23,24] leading to in situ formation of PNIPAM-capped Au NPs.I mportantly,t he surface of Au NP is intimately and permanently ligated by PNIPAM as ar esult of original covalent bonding between outer PNIPAM and PA Ablocks in starlike PA A-b-PNIPAM, eliminating the inevitable ligand dissociation issue because of the dynamic binding nature of ligands as reported in past works.Q uite intriguingly,t hese PNIPAM-capped Au NPs remain dispersed when heating the NP aqueous solution over the LCST of PNIPAM. Notably,s trong coordination between carboxylic acid groups of inner PA Achains and the metal moieties of Au precursors in conjunction with the stable,spherical structure of unimolecular micelles render the preferential partition of abundant precursors in the compartment occupied by PA Achains, [23,24] leading to in situ formation of PNIPAM-capped Au NPs.I mportantly,t he surface of Au NP is intimately and permanently ligated by PNIPAM as ar esult of original covalent bonding between outer PNIPAM and PA Ablocks in starlike PA A-b-PNIPAM, eliminating the inevitable ligand dissociation issue because of the dynamic binding nature of ligands as reported in past works.Q uite intriguingly,t hese PNIPAM-capped Au NPs remain dispersed when heating the NP aqueous solution over the LCST of PNIPAM.…”