Au nanotriangles display interesting nanoplasmonic features with potential application in various fields. However, such applications have been hindered by the lack of efficient synthetic methods yielding sufficient size and shape monodispersity, as well insufficient morphological stability. We present here a synthesis purification protocol that efficiently addresses these issues. The can be tuned within wide range simply changing experimental parameters. obtained monodispersity leads to...

Materials scientists have performed exceptional accomplishments in the design of various types materials that can be directly used for biomedical research. In particular, nanomaterials (including plasmonic nanoparticles) become forefront scaffolds designing bioactive materials. The application such biomedicine however requires a directed providing actuation and stability particularly complex environment as living organisms. Enhanced diagnostic tools diseases cancer HIV are pursued, this...

The translation of a technology from the laboratory into real world should meet demand economic viability and operational simplicity. Inspired by recent advances in conductive ink pens for electronic devices on paper, we present “pen‐on‐paper” approach making surface enhanced Raman scattering (SERS) substrates. Through this approach, no professional training is required to create SERS arrays paper using an ordinary fountain pen filled with plasmonic inks comprising metal nanoparticles...

During the last decade, scientific community has become interested in hybrid nanomaterials, especially ones that combine gold nanoparticles with a second functional component. In this context, coordination polymers are materials possess potential advantages over conventional inorganic nanomaterials and organic compounds such as chemical versatility, easy processability, high specific area, low toxicity, biodegradability electronic magnetic functionalities to name few. manner, wise...

Self-assembly of inorganic nanoparticles has been used to prepare hundreds different colloidal crystals, but almost invariably with the restriction that particles must be densely packed. Here, we show non-close-packed nanoparticle arrays can fabricated through selective removal one two components comprising binary superlattices. First, a variety superlattices were prepared at liquid-air interface, including several arrangements previously unknown. Molecular dynamics simulations revealed...

Enzymatic oxidation of gold nanorods by the enzymatic activity horseradish peroxidase.

A simple chemical protocol to prepare core-shell gold@spin-crossover (Au@SCO) nanoparticles (NPs) based on the 1D spin-crossover [Fe(Htrz)2 (trz)](BF4 ) coordination polymer is reported. The synthesis relies a two-step approach consisting of partial surface ligand substitution citrate-stabilized Au NPs followed by controlled growth very thin layer SCO polymer. As result, colloidally stable core@shell spherical with core ca. 12 nm and shell 4 thick, are obtained, exhibiting narrow...

To date, a plethora of electrocatalysts for the Oxygen Evolution Reaction (OER) have been proposed. For evaluating their electrocatalytic behavior determination onset potential in each studied electrolyte is key parameter. Nevertheless, this evaluation becomes particularly problematic first-transition metal catalysts as well by use electroactive collectors (e.g. Ni foams) whose redox peaks overlap potential. A usual solution to detect requires availability in-situ mass spectrometric...

Abstract Plasmonic metallic nanostructures have gained significant attention due to their ability confine light at the nanoscale. In this study, influence of minor morphological variations by truncation different planes on plasmonic response colloidal Au nanocube dimers and separation (nanogap) is investigated electron energy loss spectroscopy (EELS). To understand impact these factors, two cube models for numerical simulations been considered: one mimicking {111} facets, another {110} ones....

The spin transition of a Au nanostar and SCO heterostructure has been induced by irradiating with low-intensity NIR light.

We present herein a novel combination of gated mesoporous silica nanoparticles (MSNs) and surface-enhanced Raman scattering (SERS) for sensing applications. As proof-of-concept, we show the design system comprising MSNs loaded with crystal violet (CV), molecule high cross section acting as SERS reporter, capped either suitable DNA sequence detection Mycoplasma genomic or an aptamer that selectively coordinates cocaine. In both cases presence corresponding target analyte in solution (i.e.,...

Surface and interface control is fundamentally important for crystal growth engineering, catalysis, surface-enhanced spectroscopies, self-assembly, among other processes applications. Understanding the role of ligands in regulating surface properties plasmonic metal nanocrystals during has received considerable attention. However, underlying mechanisms diverse functionalities are yet to be fully addressed. In this contribution, we report a systematic study ligand-mediated seeded gold...

Au@PBA nanoparticles exhibiting an enhanced electrocatalytic activity and stability, compared to pristine PBAs other Au–PBA nanostructures, have been prepared.

We have developed a general protocol for the preparation of hybrid nanostructures formed by nanoparticles (NPs) molecule-based magnets based on Prussian Blue Analogues (PBAs) decorated with plasmonic Au NPs different shapes. By adjusting pH, can be attached preferentially along edges PBA or randomly surface. The allows tuning properties hybrids in whole visible spectrum.

A simple, portable and costeffective method for the fabrication of ultrasensitive SERS substrates through “pen-on-paper” approach is presented by Luis M. Liz-Marzán co-workers on page 3065. Arrays are created paper using a fountain pen filled with plasmonic ink made gold nanospheres, silver or nanorods, which can be used at any excitation wavelength. This work expected to bring closer real world.

The preparation of spherical core–shell nanoparticles formed by a gold core and an ultrathin layer spin crossover coordination polymer (4 nm thick) is described Marc Coronado-Puchau, Mónica Giménez-Marqués, Eugenio Coronado, co-workers in article number 1900039. optimal deposition into electrical device reveals high responses memory effects the conductance upon spin-state switching, operating at technologically relevant conditions.

<p>A simple protocol to prepare core-shell gold@spin-crossover (Au@SCO) nanoparticles (NPs) based on the 1D spin-crossover [Fe(Htrz)<sub>2</sub>(trz)](BF<sub>4</sub>) coordination polymer is reported. The synthesis relies a two-step approach consisting partial surface ligand substitution of citrate-stabilized Au NPs followed by controlled growth very thin layer SCO polymer. As result, colloidally stable core@shell spherical 19 nm in size exhibiting narrow...

A simple protocol to prepare core-shell gold@spin-crossover (Au@SCO) nanoparticles (NPs) based on the 1D spin-crossover [Fe(Htrz) 2 (trz)](BF 4 ) coordination polymer is reported. The synthesis relies a two-step approach consisting partial surface ligand substitution of citrate-stabilized Au NPs followed by controlled growth very thin layer SCO polymer. As result, colloidally stable core@shell spherical 19 nm in size exhibiting narrow distribution sizes have been obtained, revealing...

Prussian blue analogues (PBAs) have shown to be useful as earth-abundant electrocatalysts for the Oxygen Evolution Reaction (OER) in acidic, neutral and alkaline media. Still, further improvements can achieved by increasing their electrical conductivity. In this work, we obtained fully characterized a variety of monodisperse core@shell hybrid nanoparticles Au@PBA (PBA NiIIFeII CoIIFeII) with different shell sizes. Their electrocatalytical activity is evaluated studying OER, which compared...

Prussian blue analogues (PBAs) have shown to be useful as earth-abundant electrocatalysts for the Oxygen Evolution Reaction (OER) in acidic, neutral and alkaline media. Still, further improvements can achieved by increasing their electrical conductivity. In this work, we obtained fully characterized a variety of monodisperse core@shell hybrid nanoparticles Au@PBA (PBA NiIIFeII CoIIFeII) with different shell sizes. Their electrocatalytical activity is evaluated studying OER, which compared...