Surfactants and polymers on nanoscale surfaces: the interface landscape of plasmonic nanostars DOI Creative Commons

Debora Ferrari,

Chiara Deriu, Laura Fabris

et al.

Frontiers in Nanotechnology, Journal Year: 2024, Volume and Issue: 6

Published: Dec. 24, 2024

Surfactants and polymers are widely used as shape-directing agents in the synthesis of colloidal plasmonic nanostars, consequently acting non-negligible players all those high-performance applications which processes occur at their interfaces, such surface enhanced Raman spectroscopy (SERS) plasmon-induced catalysis. Therefore, elucidating surfactant- polymer-metal interactions is critical to rationally improving performance nanostars same range applications. In this mini-review, we present traditional state-of-the-art characterization methods that can be investigate ligand-surface on mature nanostars. Due historically based limitations availability nanostar-specific literature, utilize nanorod literature a starting point critically infer analytical approaches seamlessly translated nanostar systems, instead need adapted intercept peculiar needs imposed by branched nanoparticle morphology.

Language: Английский

Seed‐Mediated Growth and Advanced Characterization of Chiral Gold Nanorods DOI Creative Commons
Bing Ni, Guillermo González‐Rubio, Kyle Van Gordon

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(47)

Published: Oct. 9, 2024

Abstract The controlled growth of gold nanostructures with complex shapes and reduced symmetry, exemplified by chiral nanorods nanoparticles, is one the most dynamic fields nanochemistry. A timely summary underlying concepts, including mechanisms redefined chirality measures, would further promote this research area. In perspective, we aim to establish qualitative connections between conditions, specifically for seed‐mediated synthesis as a convenient case morphogenesis. crystallographic morphological features achiral used seeds, experimental conditions during growth, symmetry inducers, can all be exploited obtain intricate shapes. Chirality characterization (such electron tomography techniques) quantification (including measures) emerge critical aspects comprehensively explore understand such structures, enabling optimization their geometric optical features. We conclude discussing relevant challenges addressed toward better plasmonic nanostructures.

Language: Английский

Citations

8

Water-induced degradation mechanism of metal halide perovskite nanocrystals DOI
Hyeonjong Ma, Eonhyoung Ahn, Daewon Lee

et al.

Matter, Journal Year: 2025, Volume and Issue: unknown, P. 102083 - 102083

Published: March 1, 2025

Language: Английский

Citations

1

Molecular-Scale Insights into the Heterogeneous Interactions between an m-Terphenyl Isocyanide Ligand and Noble Metal Nanoparticles DOI Creative Commons
Liya Bi, Yufei Wang, Zhe Wang

et al.

Nano Letters, Journal Year: 2025, Volume and Issue: 25(5), P. 2027 - 2033

Published: Jan. 23, 2025

The structural and chemical properties of metal nanoparticles are often dictated by their interactions with molecular ligand shells. These highly material-specific can vary significantly even among elements within the same group or materials similar crystal structure. In this study, we surveyed heterogeneous between an m-terphenyl isocyanide Au Ag (NPs) at single-molecule limit. Specifically, found that ligation behavior molecule differs AgNPs. Surface-enhanced Raman spectroscopy measurements revealed unique enhancement factors for two vibrational modes surfaces, indicating different binding geometries. Molecular-level characterization using scanning tunneling microscopy allowed us to directly visualize these variations which assign as distinct mechanisms. This molecular-scale visualization provides clear insights into ligand–metal well spectroscopic characteristics isocyanide-functionalized NPs.

Language: Английский

Citations

0

Molecular Imaging for Biomimetic Nanomedicine in Cancer Therapy: Current Insights and Challenges DOI

Wenzhu Hu,

Mengting Li, Feng Yuan

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 29, 2025

Coating biological membranes onto biomimetic nanocarriers improves biocompatibility, prolongs circulation, and enhances targeted delivery for cancer precision medicine. To better understand the biodistribution profiles of these nanosystems, molecular imaging techniques, including optical imaging, radionuclide magnetic resonance ultrasound have been widely employed in vivo tracking dynamic imaging. Here this review, we delve into profound role modalities visualizing changes tumor microenvironment, particularly monitoring oxygen consumption immune response dynamics, highlighting their potential to improve therapies. We also briefly discuss current applications synergistic therapies future perspectives. Finally, offer insights integrating nanomedicine with clinical translation.

Language: Английский

Citations

0

Applying Molecular Dynamics Simulations to Unveil the Anisotropic Growth Mechanism of Gold Nanorods: Advances and Perspectives DOI Creative Commons

José Adriano da Silva,

Paulo A. Netz, Mário R. Meneghetti

et al.

Journal of Chemical Information and Modeling, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 28, 2025

The unique properties of gold nanorods (AuNRs), combined with their relatively straightforward production, good yields, and satisfactory control over size shape, have sparked considerable interest in potential applications. However, the mechanism behind these particles' formation continues to be a subject significant debate. Many experimental studies been designed undertaken understand how AuNRs can produced through seed-mediated methods. In recent years, quantum mechanics molecular dynamics simulations added repertoire tools for investigating this topic. By comparing data, essential aspects anisotropic growth revealed. This review presents an overview mechanisms proposed creating methods, grounded both simulation studies, also highlights some remaining gaps our understanding process that need further exploration.

Language: Английский

Citations

0

Quantification of Nanomaterial Surfaces DOI Creative Commons

Harshit Kumar,

Mingdi Yan

Published: March 10, 2025

Review Quantification of Nanomaterial Surfaces Harshit Kumar and Mingdi Yan * Department Chemistry, University Massachusetts Lowell, 1 Avenue, MA 01854, USA Correspondence: [email protected] Received: 24 February 2025; Revised: 3 March Accepted: 5 Published: 10 2025 Abstract: nanomaterial surfaces is critical in the design nanomaterials with predictable tailored functions. Nanomaterials exhibit unique surface properties, such as high surface-to-volume ratios tunable chemistry, which govern their stability, reactivity, functions a wide range applications including catalysis, drug delivery, bioimaging, environmental remediation. However, quantitative analysis challenging due to inherent heterogeneity, affects structure, ligand density presentation. This mini review discusses several important aspects quantification, density, functional groups, reactions. Traditional analytical methods, nuclear magnetic resonance (NMR) spectroscopy, mass spectrometry (MS), UV-vis well emerging techniques that offer higher spatial resolution sensitivity are discussed, examples given.

Language: Английский

Citations

0

Ligand–Solvent Library Design for Tailoring Interparticle Interactions in Colloidal Nanocrystals DOI
Miao Deng, Ziyan Zhang, Lei Liu

et al.

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: March 10, 2025

This study explores the critical role of nonpolar ligand-solvent systems in modulating interparticle interactions colloidal nanocrystals, profoundly affecting stability and enabling precision self-assembly. A library 28 ligands with diverse molecular fragments─double bonds, branched chains, benzene rings, naphthalene rings─and four solvents was developed to investigate how fragment types positions affect ligand ordering attraction. Explicit solvent simulations enhanced sampling techniques reveal that fragments near headgroup or midsection disrupt weaken attraction, whereas terminal placement fosters ordered packing enhances Simulation predictions on relationship between structures were validated through self-assembly experiments using nanocrystals passivated by six representative ligands. Furthermore, potential control demonstrated tuning types, positions, combinations, sizes. work deepens understanding dynamics provides a theoretical framework for molecular-level design nanocrystal

Language: Английский

Citations

0

Imaging of Hydrated and Living Cells in Transmission Electron Microscope: Summary, Challenges, and Perspectives DOI Creative Commons
Olga Kaczmarczyk, Daria Augustyniak, Andrzej Żak

et al.

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: March 29, 2025

Transmission electron microscopy (TEM) is well-known for performing in situ studies the nanoscale. Hence, scientists took this opportunity to explore subtle processes occurring living organisms. Nevertheless, such observations are complex─they require delicate samples kept liquid phase, low dose, and proper cell viability verification methods. Despite being highly demanding, so-called "live-cell" experiments have seen some degree of success. The presented review consists an exhaustive literature on reported associated subjects, including phase imaging, radiation interactions with liquids, methods testing. challenges modern, reliable research organisms widely explained discussed, future perspectives developing these techniques presented.

Language: Английский

Citations

0

Fascial Manual Medicine: A Continuous Evolution DOI Open Access
Bruno Bordoni, Allan R Escher

Cureus, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 14, 2024

From the perspective of fascial manual medicine (FMM), body should not be considered as a set compartments, but functional continuum, where most tissues (considering embryology) are fascia. The cells that make up fascia can use multiple strategies to communicate, with neighboring cells, tissue which they belong, and entire body, thanks biochemical (microscopy) electromagnetic (nanoscopy) possibilities. These capacities send receive information border or layer different seem absent. All techniques profess only ones work on patient's symptoms, dictating standardized procedure all patients undergo, represent clinical deviation. Likewise, thinking approach provide biomechanical stimuli single specific structure is conceptual error. This narrative review briefly reviews history fascial-related nomenclature how system currently considered, posing new reflections continuum could conceived by practitioners who apply FMM in clinic, such osteopaths, chiropractors, physiotherapists.

Language: Английский

Citations

1

Graphene-Assisted Electron-Based Imaging of Individual Organic and Biological Macromolecules: Structure and Transient Dynamics DOI
Deyi Zhang, Zhipeng Xu,

Jia‐Ye Li

et al.

ACS Nano, Journal Year: 2024, Volume and Issue: 19(1), P. 120 - 151

Published: Dec. 26, 2024

Characterizing the structures, interactions, and dynamics of molecules in their native liquid state is a long-existing challenge chemistry, molecular science, biophysics with profound scientific significance. Advanced transmission electron microscopy (TEM)-based imaging techniques use graphene emerged as promising tools, mainly due to performance on spatial temporal resolution. This review focuses various approaches achieving high-resolution individual transient interactions. We highlight crucial role grids cryogenic for Ångstrom-level resolution resolving structures importance cells liquid-phase TEM directly observing subnanometer at frame rate several frames per second, well cross-talks two modes. To understand chemistry physics encoded these movies, incorporating machine learning algorithms image analysis provides approach that further bolsters adventure. Besides reviewing recent advances methodologies using graphene, this also outlines future directions improve envision problems biology could benefit from experiments.

Language: Английский

Citations

1