Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
We report on the assembly of gold nanoparticle (AuNPs) superlattices at the liquid/vapor interface and in the bulk of their suspensions. Interparticle distances in the assemblies are achieved on multiple length scales by varying chain lengths of surface grafted AuNPs by polyethylene glycol (PEG) with molecular weights in the range 2000-40,000 Da. Crystal structures and lattice constants in both 2D and 3D assemblies are determined by synchrotron-based surface-sensitive and small-angle X-ray scattering. Assuming knowledge of grafting density, we show that experimentally determined interparticle distances are adequately modeled by spherical brushes close to the θ point (Flory-Huggins parameter, ) for 2D superlattices at a liquid interface and a nonsolvent (χ = ∞) for the 3D dry superlattices.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.langmuir.1c01547 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Covalent Functionalization Yields High-Performance Supercapacitor Materials.
Small
September 2025
Department of Chemistry, Indian Institute of Technology, Kanpur, Uttar Pradesh, 208016, India.
Redox-active organic-inorganic hybrid electrode materials are promising candidates for eco-friendly, high-energy-density supercapacitors. The synergy between organic and inorganic components in energy storage devices has attracted considerable interest due to their complementary attributes, including flexibility, long-term stability, and high conductivity. This study presents an innovative approach for synthesizing an organic-inorganic active electrode material by grafting diazonium salts of 8-aminoquinoline (8-AQ-N ) onto CuFeO nanoparticle (NP) surfaces.
View Article and Find Full Text PDFEthylene Electrosynthesis from Acetylene at Ampere-Level Current Density via Promoting Interparticle Mass Transport.
Angew Chem Int Ed Engl
September 2025
State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
The electrocatalytic acetylene semi-hydrogenation (EASH) driven by renewable energy offers an important non-petroleum route for ethylene production, yet suffers from insufficient reaction rate, ethylene selectivity, and energy efficiency. While tailoring catalytically active structures is effective for improving the EASH performance, the effects of mass transport at the mesoscale are poorly understood. Here, we show quantitatively the crucial role of interparticle mass transport within the catalyst layer of a gas diffusion electrode.
View Article and Find Full Text PDFSuccessive Spin Coating Induces an Order-Disorder Transition in a Block Copolymer Micellar Nanoarray.
J Phys Chem Lett
September 2025
CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Hefei, Anhui 230027, China.
Controlling the spatial arrangement of nanodots is pivotal for functional nanomaterials and biointerfaces, and the spontaneous self-assembly of block copolymer micelles has been widely used to fabricate ordered nanostructures. However, achieving tunable disorder remains a fundamental challenge. Here, we demonstrate how successive spin coating dynamically modulates both density and disorder in micellar arrays, revealing an unexpected non-monotonic evolution of structural order.
View Article and Find Full Text PDFLattice-dependent orientational order in active crystals.
Soft Matter
August 2025
Max Planck Institute for the Physics of Complex Systems, Nöthnitzerst. 38, 01187 Dresden, Germany.
Via mechanisms not accessible at equilibrium, self-propelled particles can form phases with positional order, such as crystals, and with orientational order, such as polar flocks. However, the interplay between these two types of order remains relatively unexplored. Here, we address this point by studying crystals of active particles that turn either towards or away from each other, which can be experimentally realised with phoretic or Janus colloids or with elastically-coupled walker robots.
View Article and Find Full Text PDFOptically Driven Microgear Transmission System via Optical, Hydrodynamic, and Frictional Coupling.
Nano Lett
September 2025
School of Physics, Central South University, Changsha 410083, China.
Optical tweezers, with noncontact and high-precision manipulation, offer unique advantages in micro-nano mechanics and microfluidics. Here, we demonstrate an all-optical microgear transmission strategy based on dynamically assembled microrotors driven by vortex beams. The microrotors driven by the optical torque of vortex beams can generate localized flow fields, combined with optical forces and interparticle friction, forming a coupled transmission mechanism for angular momentum transfer.
View Article and Find Full Text PDF