Structural Color Colloidal Photonic Crystals for Biomedical Applications

Advanced Science, Год журнала: 2024, Номер unknown

Опубликована: Июль 31, 2024

Photonic crystals are a new class of optical microstructure materials characterized by dielectric constant that varies periodically with space and features photonic bandgap. Inspired natural such as butterfly scales, series artificial developed for use in integrated platforms, biosensing, communication, other fields. Among them, colloidal (CPCs) have gained widespread attention due to their excellent properties advantages, ease preparation functionalization. This work reviews the classification self-assembly principles CPCs, details some latest biomedical applications large-area, high-quality CPCs prepared using advanced methods, summarizes existing challenges CPC construction application, anticipates future development directions optimization strategy. With further advancements, expected play more critical role biosensors, drug delivery, cell research, fields, bringing significant benefits research clinical practice.

Язык: Английский

---

Nanohelix Arrays with Giant Circular Dichroism through Patch-Enthalpy-Driven Self-Confined Self-Assembly of Janus Nanoparticles

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Март 10, 2025

Plasmonic nanohelix arrays, exhibiting strong circular dichroism, are among the most promising optical chiral metamaterials. However, achieving plasmonic effects in visible range remains challenging with current manufacturing techniques, as it requires structures small enough to resonate at wavelengths. Herein, we propose a novel strategy for constructing arrays through patch-enthalpy-driven self-confined self-assembly of Janus nanoparticles. The hexagonal columnar structures, self-assembled from nanoparticles, create cylindrical environment within each column, where patch-enthalpy drives particles form helical structures. Numerical simulations reveal that induces sequential formation multiple helices double helix and finally single helix. Additionally, property calculations demonstrate these exhibit giant dichroism high g-factors frequencies. Our proposed construction offers route developing metamaterials

Язык: Английский

---

Arbitrary Design of DNA-Programmable 3D Crystals through Symmetry Mapping

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Апрель 11, 2025

Nanoscale self-assembly offers exciting potential for creating intricate structures beyond the limits of traditional top-down nanofabrication. Despite advancements in molecularly programmable assembly, particularly utilizing DNA nanotechnology, challenges remain defining precise assembly instructions formation complex three-dimensional (3D) superlattice architectures. DNA-based methods offer programmability through sequence-encoded addressable bonds, but difficulty lies reducing complexity and number these interactions to establish a modular, structural design strategy streamline component fabrication process. This work proposes symmetry-mapping bond assignment algorithm guide arbitrarily prescribed 3D lattices self-assembled from voxels with directional, bonds capable carrying nanocargo. The enables minimization voxels, thus amount information required encode assembly. developed approach leverages symmetries target lattices, assembled significantly incorporates experimentally relevant binding rules restrictions specific systems. We discuss demonstrate its capability selected examples nanoscale analogs zinc blende (ZnS) cubic Laves phase (MgCu2), as well lattice based on an designed motif (letter H). Through established associated software Mapping Of Structurally Encoded aSsembly (MOSES), this inverse provides scalable solution designing complexly organized nanostructures, providing means programming bottom-up nanomaterial fabrication.

Язык: Английский

---

Van der Waals Colloidal Crystals

Advanced Materials, Год журнала: 2024, Номер 36(23)

Опубликована: Март 7, 2024

Abstract A general guiding principle for colloidal crystallization is to tame the attractive enthalpy such that it slightly overwhelms repulsive interaction. As‐synthesized colloids are generally designed retain a strong potential high stability of suspensions, encoding appropriate potentials into has been key their crystallization. Despite myriad interparticle attractions crystallization, van der Waals (vdW) force remains unexplored. Here, shown implementation gold cores silica and resulting vdW can reconfigure pair well depth optimal range between −1 −4 k B T at tens nanometer‐scale distances. As such, crystals with distinct liquid gap be formed, which evidenced by photonic bandgap‐based diffractive colorization.

Язык: Английский

---

Formation of various structures caused by particle size difference in colloidal heteroepitaxy

Scientific Reports, Год журнала: 2024, Номер 14(1)

Опубликована: Фев. 8, 2024

By performing isothermal-isochoric Monte Carlo simulations with depletion force, the author investigated dependence of epitxial layer structure on differences in particle size between substrate colloidal heteroepitaxy. changing epitaxial particles and comprehensively, various structures including observed a experiment, such as honeycomb, one created by hexagonal heptamers, consisting both pentagonal tiles triangular tiles, were created. When ratio sizes takes specific value, two types One is parallel to other rotated 60[Formula: see text] from layer. The former was over wide range particle-size ratios, whereas latter when only around ratio, it seemed metastable structure.

Язык: Английский

---

Nonequilibrium Self-Assembly Control by the Stochastic Landscape Method

Journal of Chemical Information and Modeling, Год журнала: 2025, Номер unknown

Опубликована: Апрель 8, 2025

Self-assembly of building blocks is a fundamental process in nanotechnology, materials science, and biological systems, offering pathways to the formation complex functional structures through local interactions. However, lack effective error correction mechanisms often limits efficiency precision assembly, particularly systems with strong binding energies. Inspired by cellular processes stochastic resetting, we present closed-loop feedback control method that employs transient modulations interaction energies, mimicking, for instance, global effect pH changes as nonequilibrium drives optimize assembly outcomes real time. By leveraging landscape method, framework using energy trend-based segmentation predict self-assembly behavior, our approach dynamically analyzes system's state trends guide actions. We show modulation during kinetic trapping conditions substantially enhances yields reduces times across diverse scenarios. This strategy provides broadly applicable, data-driven optimizing processes, potential implications manufacturing responsive design, while also advancing understanding controlled molecular synthetic contexts.

Язык: Английский

---

Dissipative Self-Assembly of Patchy Particles under Nonequilibrium Drive: A Computational Study

Journal of Chemical Theory and Computation, Год журнала: 2024, Номер 20(20), С. 8844 - 8861

Опубликована: Окт. 4, 2024

Inspired by biology and implemented using nanotechnology, the self-assembly of patchy particles has emerged as a pivotal mechanism for constructing complex structures that mimic natural systems with diverse functionalities. Here, we explore dissipative under nonequilibrium conditions, aim overcoming constraints imposed equilibrium assembly. Utilizing extensive Monte Carlo (MC) Molecular Dynamics (MD) simulations, provide insight into effects external forces mirror chemical processes on assembly rates stability resulting assemblies comprising 8, 10, 13 particles. Implemented favorable bond-promoting drive in MC or pulsed square wave potential MD, our simulations reveal role these drives play accelerating kinetics enhancing structural stability, evidenced decrease time to first an increase duration system remains assembled state. Through analysis order parameter, entropy production, bond dynamics, interparticle forces, unravel underlying mechanisms driving advancements. We also validated key findings simulating larger 100 Our comprehensive results not only shed light impact stimuli but open promising pathway expanding application leveraging novel nanostructures.

Язык: Английский

---

Structures of the First Epitaxial Layer Created in Colloidal Heteroepitaxy

The Journal of Physical Chemistry B, Год журнала: 2024, Номер 128(43), С. 10779 - 10787

Опубликована: Окт. 22, 2024

Brownian dynamics simulations have been performed to investigate the structural dependence of first epitaxial layer in colloidal heteroepitaxy. When particles were larger than substrate and interactions dominated by depletion force, a hexagonal structure formed on closely packed substrate. The orientation this varied with size ratio make interaction between strong. sizes similar, long-period structures instead strengthen at expense layer.

Язык: Английский

---

Automating Blueprints for the Assembly of Colloidal Quasicrystal Clusters

ACS Nano, Год журнала: 2024, Номер unknown

Опубликована: Дек. 20, 2024

One of the frontiers nanotechnology is advancing beyond periodic self-assembly materials. Icosahedral quasicrystals, aperiodic in all directions, represent one most challenging targets that has yet to be experimentally realized at colloidal scale. Previous attempts have required meticulous human-designed building blocks and often resulted interactions current experimental capabilities. In this work, we introduce a framework for generating accessible designs self-assemble into quasicrystalline arrangements. We present design icosahedral deoxyribonucleic acid (DNA) origami demonstrate, through molecular simulations, their successful assembly target structure. Our results highlight feasibility using automated protocols achieve complex patterns, with applications material science nanotechnology.

Язык: Английский

---

Self-Assembling of Nonadditive Mixtures Containing Patchy Particles with Tunable Interactions

The Journal of Physical Chemistry B, Год журнала: 2023, Номер 127(41), С. 8982 - 8992

Опубликована: Окт. 5, 2023

Mixtures of nanoparticles (NPs) with hybridizing grafted DNA or DNA-like strands have been particular interest because the tunable selectivity provided for interactions between NP components. A richer self-assembly behavior would be accessible if these NP-NP could designed to give nonadditive mixing (in analogy case molecular components). Nonadditive occurs when mixed-state volume is smaller (negative) larger (positive) than sum individual components' volumes. However, instances nonadditivity in colloidal/NP mixtures are rare, and systematic studies such nonexistent. This work focuses on patchy NPs whose patches (coarsely representing strands) not only encode across components but also impart a by varying their extent protrusion. To guide exploration relationship phase different patches' designs, NP–NP potential mean force (PMF) parameter were first calculated. For one-patch NPs, lamellar morphologies predominantly observed. In contrast, two-patch (fully grafted) spherical particles, rich was found depending patch–patch angle degree nonadditivity, resulting phases as gyroid, cylinder, honeycomb, two-layered crystal. Our results show that both minimum positive multivalent necessary formation ordered network mesophases class models studied.

Язык: Английский

---