An efficient strategy for immobilizing proteins on a gold surface was developed by employing the binding polypeptide (GBP) as fusion partner. Using enhanced green fluorescent protein (EGFP), severe acute respiratory syndrome coronavirus (SARS-CoV) envelope (SCVme), and core streptavidin (cSA) of Streptomyces avidinii model proteins, specific immobilization GBP-fusion onto nanoparticles generation nanopatterns bare were demonstrated. The GBP-fused SCVme bound to successfully interacted with...

The paper represents a novel approach to investigating localized surface plasmon (LSP) resonance modes of nanoporous Au nanorods (NRs) in solution phase with control over morphology. NRs, which have distinctive features such as nanopores and ligaments, showed interesting LSP depending on the morphology total length structure. Compared analogous smooth NRs are red-shifted, can be interpreted longer effective rod larger amplitude oscillation.

This paper reports a methodology for synthesizing and ordering gold nanorods into two-dimensional arrays at water/hexane interface. preparation method allows the systematic control of nanoparticle film thickness. An investigation thickness-dependent surface-enhanced Raman scattering (SERS) adsorbed molecules revealed nanorod (NR) films to have 1 order magnitude stronger SERS enhancement than nanosphere (NS) under similar experimental conditions. The exposed surface areas prepared NR NS were...

We synthesized hollow Au-Ag nanospheres (NSs) by employing a galvanic replacement reaction between HAuCl4 and Ag NSs. Uniform NSs with controllable sizes were as sacrificial templates seed-mediated strategy. The atomic ratio of Au to in was tunable controlling the reagent concentration. UV-vis extinction spectra acquired from well-dispersed colloidal NS solutions used investigate optical properties solutions. In addition common dipole mode exhibited on most transition metal nanoparticles, we...

The optical properties of two-component quasi-one-dimensional nanostructures consisting Au and Ni blocks have been investigated. optically inactive component plays a relaying role in the surface plasmon coupling both for dipole mode higher-order modes gold blocks. experimental results exhibit that free electrons participate phenomenon excitations induce to oscillate.

The optical properties of two-component nanorods (NRs) consisting Au and Ag blocks were investigated. overall the tailored by controlling block length. We observed two independent transverse modes in blocks. Depending on relative fraction blocks, intensity varied without noticeable peak shifts. However, strong intraparticle surface plasmon coupling between resulted collective appearance longitudinal LSP modes, including higher-order modes. This experimental observation suggests that free...

Alloy nanorods consisting of bimetallic gold and silver are synthesized by employing the electrochemical codeposition Au/Ag alloy materials into pores anodized aluminum oxide templates. This paper presents variation localized surface plasmon resonance (LSPR) modes Au(x)/Ag(1-x) as a function relative compositions Au Ag. Transverse multiple longitudinal were observed when length was longer than ca. 300 nm. For given length, transverse LSPR mode systematically blue-shifted Ag portion...

The utilization of vertically aligned smooth gold nanorod arrays with and without nanoporous tip architectures as superhydrophobic surfaces is described. Nanoporous architecture was produced on the tips nanorods by selectively dissolving less noble components from alloy nanorods. resulting nanoscopic dual-size roughness features enhanced surface dewettability after modification low-surface-energy materials such long-chain normal alkanethiols fluorinated organic compounds. cleaning properties...

A methodology for synthesizing different sized gold nanorods and ordering them into a two-dimensional array at water/hexane interface without linker-molecule is reported. The resulting nanorod film was transferred to solid substrate repeatedly, allowing systematic control of the thickness. An investigation thickness-dependent surface enhanced Raman scattering (SERS) adsorbed molecules revealed SERS enhancement as function size under similar experimental conditions. factor per layer each...

Single-component silver and copper nanorods were synthesized by employing the electrochemical deposition of Ag Cu materials into pores anodized aluminium oxide templates. Ni blocks that predeposited AAO nanochannels served as a sacrificial layer for detaching from Residual could be effectively separated nanorod solution applying magnetic field. This separation concept allows one to synthesize less noble metals like shape using methods. paper also presents variation in localized surface...

Abstract Scalable and economical methods for the production of optically pure amino acids, both natural unnatural, are essential their use as synthetic building blocks. Currently, enzymatic dynamic kinetic resolution (DKR) underpins some most effective processes. Here we report development enantioselective extraction coupled with racemization (EECR) chirality conversion underivatized acids. In this process, catalytic acids in a basic aqueous solution is selective one enantiomer into an...

Silver nanoparticles (NPs) ranging in size from 40 to 100 nm were prepared high yield by using an improved seed-mediated method. The homogeneous Ag NPs used as building blocks for 2D assembled NP arrays oil/water interface. A close-packed array of was fabricated packing molecules (3-mercaptopropyltrimethoxysilane) control the interparticle spacing. exhibited a strong quadrupolar cooperative plasmon mode resonance and dipolar red-shift relative individual suspended solution. well-arranged...

With the combination of a molecular combing technique and scanning-probe lithographic patterning, lambda-DNA's were stretched aligned to form line array structures on patterned organic monolayer surfaces. The pattern was generated by anodizing silicon surface using lithography implant polar layer in middle nonpolar layer. molecule layer, (aminopropyl)triethoxysilane (APS), has -NH(3)(+) terminal group, which interacts strongly with phosphate backbone DNA provides site for selective...

Stimuli-responsive polymeric systems are of considerable interest due to their potential applications in environment-adaptive technologies such as smart surfaces. Traditionally, can be constructed either by dynamic noncovalent (supramolecular) or covalent chemistry, but the use both chemistries one system may offer unique opportunities for structural diversity and various controllability. Herein, we report that hydrazone–pyridinum conjugates, which dynamically exchanged transimination,...

We have fabricated uniform, large-area, and two-dimensional arrays of gold (and silver) nanomesh structures via metal sputtering on an anodic aluminum template. studied the localized surface plasmon resonance originating from edges nanopores in structure. The resulting nanomeshes exhibited strong surface-enhanced Raman scattering (SERS) signals, measured SERS response was highly uniform throughout whole area. enhancement at edge is believed to be responsible for response. Also, we Au/Ag...

We report graphene/ferroelectric/graphene hybrid structure to demonstrate an asymmetrical doping in two graphene layers, one side with electrons and another holes. Two ferroelectrics, a poly(vinylidenefluoride) (PVDF) hydrofluorinated graphene, were used the concept density functional calculations, revealing Fermi level shift of 0.35 0.75 eV, respectively. This was confirmed by Raman spectroscopy using graphene/poly(vinylidenefluoride-co-trifluoroethylene)(P(VDF-TrFE))/graphene hybrid, which...

We present a fabrication of conductive nanowires made gold nanoparticle (AuNP) chains based on λ-DNA molecules immobilized surface (3-aminopropyl)triethoxysilane-coated Si wafer as the template. A tilting technique was used to align and stretch λ-DNAs surface. Aniline-capped AuNPs (AN-AuNPs) were electrostatically assembled along DNAs by careful control AN-AuNPs treatment time DNA concentration. are attached with reduction in Au potential increases. Also, interparticle spacing is dependent...

Density functional theory calculations were used to determine the stability of metal slabs consisting a Pt surface monolayer and intermetallic supporting layers made from combinations six transition elements (Pt, Fe, Co, Ni, Cu, Ag), as model system for skin core nanoparticle catalysts. The is largely determined by strain at interface subsurface intermetallic, which was described lattice matching parameter (r). charge on found be correlated with average electronegativity (EN) core, so this...

Electric field-induced (EFI) reduction of graphene oxide (GO) was performed by conductive atomic force microscopy (C-AFM) in order to create a reduced GO (rGO) p–n nanopattern diode dry and non-destructive single-pot process. Single sheets were deposited the Langmuir–Blodgett (LB) method onto semiconducting (n- p-doping Si) substrates that control charge transfer at rGO interface. EFI nanolithography resulted locally nanopatterns on corresponding application negative bias voltage an n-doping...