ConspectusPlasmonic coupling-based electromagnetic field localization and enhancement are becoming increasingly important in chemistry, nanoscience, materials science, physics, engineering over the past decade, generating a number of new concepts applications. Among plasmonically coupled nanostructures, metal nanostructures with nanogaps have been special interest due to their ultrastrong fields controllable optical properties that can be useful for variety signal enhancements such as...

The design, synthesis and control of plasmonic nanostructures, especially with ultrasmall plasmonically coupled nanogap (∼1 nm or smaller), are significant interest importance in chemistry, nanoscience, materials science, optics nanobiotechnology. Here, we studied established the thiolated DNA-based synthetic principles methods forming controlling Au core-nanogap-Au shell structures [Au-nanobridged particles (Au-NNPs)] various interior structures. We found that differences binding affinities...

We have developed a selective, sensitive, and re-usable electrochemical sensor for Hg2+ ion detection. This is based on the Hg2+-induced conformational change of single-stranded DNA (ssDNA) which involves an electroactive, ferrocene-labeled hairpin structure provides strategically selective binding thymine–thymine mismatch ion. The self-assembled through S–Au bonding polycrystalline gold electrode surface blocked with 3-mercapto-1-propanol to form mixed monolayer. modified showed...

The enantioselective recognition of 3,4-dihydroxyphenylalanine using penicillamine-modified gold nanoparticles has been investigated. Smaller with one enantiomeric ligand facilitate the redox reaction only enantiomer 3,4-dihydroxyphenylalanine, cross inversion for other ligand.

Plasmonic nanostructures are widely studied and used because of their useful size, shape, composition assembled structure-based plasmonic properties. It is, however, highly challenging to precisely design, reproducibly synthesize reliably utilize with enhanced optical Here, we devise a facile synthetic method generate Au surface roughness-controlled nanobridged nanogap particles (Au-RNNPs) ultrasmall (≈1 nm) interior gap tunable roughness in controllable manner. Importantly, found that...

Abstract With advances in the design, synthesis and analysis of various metallic nanoparticles substrates, surface‐enhanced Raman scattering (SERS) with plasmonic nanostructures has been extensively studied, numerous SERS applications have demonstrated including biomedical applications; however, mechanism is not completely understood yet, many challenges, structural spectral reproducibility, exist to achieve quantitative for practical reliable use SERS. Since signal reproducibility mainly...

Multicomponent nanoparticles that incorporate multiple nanocrystal domains into a single particle represent an important class of material with highly tailorable structures and properties. The controlled synthesis multicomponent NPs 3 or more components in the desired structure, particularly anisotropic property is, however, challenging. Here, we developed polymer galvanic replacement reaction-based transformative heterointerface evolution (THE) method to form tune gold-copper-silver...

Observation of individual single-nanoparticle reactions provides direct information and insight for many complex chemical, physical, biological processes, but this is utterly challenging with conventional high-resolution imaging techniques on platforms. Here, we developed a photostable plasmonic nanoparticle-modified supported lipid bilayer (PNP-SLB) platform that allows massively parallel in situ analysis the interactions between nanoparticles single-particle resolution two-dimensional (2D)...

Surface-enhanced Raman scattering (SERS)-based sensors utilize the electromagnetic-field enhancement of plasmonic substrates with chemical specificity vibrational spectroscopy to identify trace amounts a wide variety different target analytes while being minimally affected by photobleaching. However, despite many advantageous features this method, SERS sensors, particularly for detecting hazardous chemicals, suffer from several limitations such as requirement gigantic signal that is often...

A very generous donor: The electrochemiluminescence (ECL) efficiency and radical stability of pyrene, a poor ECL luminophore, are markedly improved as the number peripheral multidonor units increased in series compounds (see picture). Photophysical electrochemical studies theoretical calculations have contributed to understanding enhancement, which is step forward development new light-emitting materials.

Abstract DNA‐modified gold nanoparticles (NPs) have been extensively explored in various applications including the construction of three‐dimensional (3D) assembly architectures and biomedical applications. As ligand molecules, DNA strands can facilitate building block function NPs due to inherent nature bonding, that is, Watson–Crick base pairing. In addition, negative electrostatic character backbones renders colloidal stability robustness under aqueous environments. Therefore, conjugation...

We report a robust one-dimensional (1D) nanoparticle-assembly strategy that uses the self-assembly of nanoparticles with ligand and thermal controls, polyethylene glycol (PEG) thiol carboxyl groups, nanoparticle oligomer polymer codewetting process to form ultralong continuous 1D nanochains. The nanochains were assembled closely packed building blocks, elongated buttressed by dynamic PEG templates formed on hydrophobic surface via anisotropic spinodal dewetting. Using this strategy,...

Polyampholyte (PA) hydrogels have great potential for biomedical applications, owing to their high toughness and good self-recovery self-healing (SELF) behavior in addition physical properties similar human tissue. However, implementation as practical skin patches or wearable devices has so far been limited by insufficient transdermal adhesion strength. In this work, a new polyampholytic terpolymer (PAT) hydrogel with enhanced was developed using novel simple strategy that tunes the...

Fano resonance stands as a significant driving force in the advancement of cutting-edge sensors, ultrasensitive spectroscopy, and microdevices with superior optical properties1–9. Although resonant structures have been extensively studied within resolution range achievable by state-of-the-art photolithography techniques (tens nm), exploring at nanoscale—where strong quantum confinement prevails—remains challenge. Here, we report colloidal Fano-resonant snowman nanoparticles (nano-Fanowman)...

Abstract In the pursuit of enhancing environmental sustainability concrete, a fundamental construction material, traditional approaches often emphasize minimizing maintenance requirements to extend lifespan and improve durability. Departing from these conventional strategies, an innovative method aimed at augmenting thermal insulation eco‐friendliness building structures is proposed, which involves integration nanoclay (NC) hydrogel confer multifunctionality upon cement materials. Within...

Abstract The amplification‐ and enzyme‐free quantification of DNA at ultralow concentrations, on the order 10–1000 targets, is highly beneficial but extremely challenging. To address this challenge, true detection signals must be reliably discriminated from false or noise signals. Herein, we describe development associating dissociating nanodimer analysis (ADNA) as a method that enables maximum number to collected target‐binding events while keeping nonspecific minimum level. In ADNA assay...

Significant enhancement of the ECL signals from Ru(bpy)(3)(2+)/TPA system was achieved when using a BDD nanograss array, mainly because highly facile oxidation TPA. The TPA is due to superior properties such as improved electrocatalytic activity and accelerated electron transfer.

This study describes the development and characterization of a novel dendritic signal amplification strategy. It relies on use two different Ru(bpy)32+-doped silica nanoparticles (Probe1,2RSNP Probe2cRSNP) coated with complementary DNAs, which can be simply conveniently self-assembled to build sandwich-type architectures gold grid. The performance this route was demonstrated in conjunction electrogenerated chemiluminescent (ECL) detection target DNA. Compared normal amplification, allowed...