Two active electrochromic materials, vacancy-doped tungsten oxide (WO(3-x)) nanocrystals and amorphous niobium (NbOx) glass are arranged into a mesostructured architecture. In strategy applicable across electrochemical applications, the critical dimensions interfacial connections in nanocomposite designed to optimize pathways for charging discharging. The result is an unprecedented optical range modulation of visible near-infrared solar radiation with rapid switching kinetics that indicate...

Low-temperature processed mesoporous nanocrystal thin films are platforms for fabricating functional composite on flexible substrates. Using a random arrangement of anisotropic nanocrystals can be facile solution to generate pores without templates. However, the tendency particles spontaneously assemble into compact structure must overcome. Here, we present method achieve networking nanorods during phase deposition by switching their ligand-stabilized colloidal nature charge-stabilized...

Doped semiconductor nanocrystals are an emerging class of materials hosting localized surface plasmon resonance (LSPR) over a wide optical range. Studies so far have focused on tuning LSPR frequency by controlling the dopant and carrier concentrations in diverse materials. However, influence anisotropic nanocrystal shape intrinsic crystal structure remain poorly explored. Here, we illustrate how these two factors collaborate to determine characteristics hexagonal cesium-doped tungsten oxide...

Charge carrier mobility in transparent conducting oxide (TCO) films is mainly limited by impurity scattering, grain boundary and a hopping transport mechanism. We enhanced the nanocrystal (NC)-based TCO films, exceeding even typical values found sputtered thin addressing each of these scattering factors. Impurity diminished incorporating cerium as dopant indium NCs instead more dopant, tin. Grain reduced using large with size 21 nm, which nonetheless were sufficiently small to avoid haze due...

Lanthanide elements exhibit highly appealing spectroscopic properties that are extensively used for phosphor applications. Their luminescence contains precise information on the internal structure of host materials. Especially, polarization behavior transition sublevel peaks is a fingerprint crystal phase, symmetry, and defects. However, this unique feature poorly explored in current research lanthanide nanophosphors. We here report detailed investigation evolution Eu3+ during thermally...

Abstract Orientation of nanoscale objects can be measured by examining the polarized emission optical probes. To retrieve a three-dimensional (3D) orientation, it has been essential to observe probe (a dipole) along multiple viewing angles and scan with rotating analyzer. However, this method requires sophisticated setup is subject various external sources error. Here, we present fundamentally different approach employing coupled dipoles that are inherent in lanthanide-doped phosphors....

Device-scale thin films of highly oriented (in-plane) colloidal nanorods are made available by using a simple coating process involving thixotropic rod gel suspensions. Application this to LaPO₄ leads exhibiting outstanding anisotropic optical properties, such as remarkably large birefringence (Δn = 0.13) associated with high transparency, and sharply polarized fluorescence spectra when doped europium.

We report a multifunctional platinium nanofiber (PtNF) web that can act as catalyst layer in dye-sensitized solar cell (DSSC) to simultaneously function transparent counter electrode (CE), i.e., without the presence of an indium-doped tin oxide (ITO) or fluorine-doped (FTO) glass. This PtNF be easily produced by electrospinning, which is highly cost-effective and suitable for large-area industrial-scale production. Electrospun PtNFs are straight have length few micrometers, with common...

Coupling effects of localized surface plasmon resonance (LSPR) represent an efficient means to tune the plasmonic modes and enhance near-field. While LSPR coupling in metal nanoparticles has been extensively explored, limited attention given heavily doped semiconductor nanocrystals. Here, we investigate behavior Cs-doped tungsten oxide (CsxWO3−δ) nanocrystal platelets as they undergo oriented assembly into parallel stacks. The was achieved by lowering dispersion stability colloidal...

Shape control during nanocrystal synthesis enables tunable physico-chemical properties that emerge at the nanoscale. While extensively studied in plasmonic metal nanoparticles and semiconductor quantum dots, shape remains less explored heavily doped nanocrystals. Here, we report of cesium-doped tungsten oxide (CsxWO3-δ) nanocrystals with exquisite achieved through continuous injection combined precursor-mediated facet-selective growth. We demonstrate anisotropic growth CsxWO3-δ strongly...

Abstract Orientation analysis of colloidally dispersed nanorods (NRs) provides a powerful means to measure local shear stress in fluids. Lanthanide‐doped crystalline NRs, with their polarized luminescence properties, offer promising platform for such shearmetry applications, as emission spectra reflect the degree collective orientation induced by shear. However, precise control over morphology NRs is essential ensuring reliable measurements, particularly complex and dynamic flow...

The optical range of localized surface plasmon resonances (LSPR) has been extended over the infrared region by using doped semiconductor nanocrystals as host materials. variable free career density and large variety compositions semiconductors have provided new methodologies to tune LSPR wavelength. However, tuning controlling anisotropic morphology nanoparticles remains poorly explored in hosts. There is also a lack material with finely tunable near-infrared (NIR) short-wavelength (SWIR)...

Shape control during nanocrystal synthesis enables tunable physicochemical properties that emerge at the nanoscale. While extensive efforts have been devoted to controlling shapes in various systems such as plasmonic metal nanoparticles or semiconductor quantum dots, shape of doped nanocrystals remains less explored and limited. Here, we report CsxWO3-δ with exquisite achieved through a continuous injection combined precursor-mediated facet-selective growth. We demonstrate anisotropic growth...

Abstract Mineral liquid crystals are materials in which mineral's intrinsic properties combined with the self‐organization behavior of colloids. However, use such a system for practical application, as optical switching, has rarely been demonstrated due to fundamental drawbacks colloidal systems limited dispersion stability. Studying suspensions LaPO 4 nanorods, it is found that drastic improvement stability can be obtained through transfer particles from water towards ethylene glycol, thus...

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTDisentangling Photochromism and Electrochromism by Blocking Hole Transfer at the Electrolyte InterfaceYang Wang†, Jongwook Kim†, Zhengning Gao‡, Omid Zandi†, Sungyeon Heo†, Parag Banerjee‡, Delia J. Milliron*†View Author Information† McKetta Department of Chemical Engineering, The University Texas Austin, 78712-1589, United States‡ Mechanical Engineering Materials Science, Washington University, St. Louis, Missouri 63130, States*(D.J.M.)...

Titanium dioxide nanoparticles were combined with carbon nanotubes and gold to develop improved photocatalysts for the production of hydrogen from water. The entangled nature allowed integration photoactive hybrid catalyst, as a packed-bed, in microfluidic photoreactor, chips studied photocatalyzed continuous flow hydrogen. combination titanium significantly due synergistic effect between multi-component system stabilization active catalytic species. dioxide/carbon nanotubes/gold permitted...

Abstract The optical range of localized surface plasmon resonance (LSPR) is extended into the infrared region, thanks to development highly doped semiconductor nanocrystals. Particularly, near‐infrared (NIR) holds a significant interest in managing solar radiation. However, practical applications necessitate arrangement particles, which known possibly impact their properties through LSPR coupling effects. How such modifies response hosts remains largely unexplored. In this study, protocol...

Room temperature operation of far-infrared detectors made self-assembled quantum dots embedded in the channel region modulation-doped heterostructures is demonstrated. At room temperature, detector shows a low dark current ranging nano-amperes at bias voltage 10 V. After optimization separation between dot and 2DEG, peak responsivity 5.3 A/W obtained 9.0 μm. The high detectivities 6×10/sup 8/ 5×10/sup 10/ cmHz <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...

Electronic and optical properties of InGaN∕InAlGaN quantum well with zero internal field were investigated by using the non-Markovian gain model many-body effects. The In composition x in to give is shown increase y barrier. InGaN∕AlGaInN system has much larger than conventional InGaN∕GaN because matrix element largely enhanced due disappearance field. peak decrease increasing for both systems. mainly reduction quasi-Fermi-level separation while that element.

When placed in the vicinity of metal nanoparticles, fluorophore molecules can have their fluorescence intensity enhanced. In order to engineer highly fluorescent thin films, surface plasmon enhancement was studied on macroscopic systems composed gold nanoparticles deposited a substrate and coated by dye-containing polymer film. We developed simple method based silanization get good dispersion up 100 nm substrate. While controlling nanoparticle size concentration, we measured factors doped...

Rare-earth doped nanocrystals possess optical transitions with significant either electric or magnetic dipole characters. They are of considerable interest for understanding and engineering light-matter interactions at the nanoscale numerous applications in nanophotonics. Here, we study ${}^{5}{D}_{0}{\ensuremath{\rightarrow}}^{7}{F}_{1}$ transition vector individual ${\mathrm{NaYF}}_{4}:{\mathrm{Eu}}^{3+}$ nanorod crystals by Fourier confocal microscopies. A single-crystal host matrix leads...

We continue our study of BPS equations and supersymmetric configurations in the Bagger–Lambert (BL) theory. The superalgebra allows three different types central extensions which correspond to compounds various M-theory objects: M2-branes, M5-branes, gravity waves Kaluza–Klein monopoles intersect or have overlaps with M2-branes whose dynamics is given by BL action. As elementary objects they are all 1/2-BPS, multiple intersections n-branes generically break supersymmetry into 1/2 n , as it...