Development of Highly Catalytically Active Bimetallic Nanoparticle Formation in Porous SiO2 by Supercritical Fluid-assisted Immobilization

application/pdf論文(Article)The supercritical carbon dioxide (scCO2) for the impregnation and deposition of metal nanoparticles are effective for uniformly decorating and impregnating porous materials. In this work, Cu-Ru bimetallic nanoparticles were successfully immobilized in the mesopores of hierarchical porous SiO2 by using scCO2-acetone solution. STEM-EDX mapping measurements demonstrated that Cu and Ru atoms were homogeneously scattered in mesopores of hierarchical porous SiO2. The resulting Cu-Ru@SiO2 exhibited high activity. The catalytic activity of bimetallic Cu-Ru@SiO2 for CO oxidation was higher than that of monometallic Cu@SiO2, Ru@SiO2 and [email protected] bulletin pape

国際経営者論の生成

Articledepartmental bulletin pape

多国籍企業の内部組織間関係に関する一考察-Laurent Leksellの所説を中心として-

Articledepartmental bulletin pape

3D hierarchically porous magnetic molybdenum trioxide@gold nanospheres as a nanogap-enhanced Raman scattering biosensor for SARS-CoV-2

The global pandemic of COVID-19 is an example of how quickly a disease-causing virus can take root and threaten our civilization. Nowadays, ultrasensitive and rapid detection of contagious pathogens is in high demand. Here, we present a novel hierarchically porous 3-dimensional magnetic molybdenum trioxide-polydopamine-gold functionalized nanosphere (3D mag-MoO3-PDA@Au NS) composed of plasmonic, semiconductor, and magnetic nanoparticles as a multifunctional nanosculptured hybrid. Based on the synthesized 3D mag-MoO3-PDA@Au NS, a universal "plug and play"biosensor for pathogens is proposed. Specifically, a magnetically-induced nanogap-enhanced Raman scattering (MINERS) detection platform was developed using the 3D nanostructure. Through a magnetic actuation process, the MINERS system overcomes Raman signal stability and reproducibility challenges for the ultrasensitive detection of SARS-CoV-2 spike protein over a wide dynamic range up to a detection limit of 10-15 g mL-1. The proposed MINERS platform will facilitate the broader use of Raman spectroscopy as a powerful analytical detection tool in diverse fields.</p

多国籍企業の管理組織に関する一考察

Articledepartmental bulletin pape

Vaccine development of mosquito-borne infectious diseases using molecular controllable multiple antigen-displaying virus-like particles

research repor

Sembrano morte,.. ma sono solo svenute. Le attrici del cinema italiano contemporaneo e l\u2019igeneration

Una moltitudine di stelle abita il cielo delle generazioni digitali. Dai cantanti alle fashion blogger, passando attraverso gli imperituri protagonisti del prime time televisivo. Le attrici no. E, soprattutto, non le attrici del cinema italiano contemporaneo. Il saggio fotografa lo stato di popolarit\ue0 (o non popolarit\ue0) delle 'dive' autoctone provando a spiegare le ragioni della loro mancanza di visibilit\ue0 nel contesto mediale e sociale contemporaneo.A plethora of stars inhabits the sky of digital generations: singers, fashion bloggers, tv stars. But not Italian cinema actress. This essay describes the status of popularity (or not popularity) of indigenous stars and tries to explain the reasons of this lack of visibility within media and social scape today

The “Chicken or the Egg” Problem in Regional Revitalization Project；example of wood pellet business

conference pape

Plasmonic Oleylamine-Capped Gold and Silver Nanoparticle-Assisted Synthesis of Luminescent Alloyed CdZnSeS Quantum Dots

We report on a novel strategy to tune the structural and optical properties of luminescent alloyed quantum dot (QD) nanocrystals using plasmonic gold (Au) and silver (Ag) nanoparticles (NPs). Alloyed CdZnSeS QDs were synthesized via the organometallic synthetic route with different fabrication strategies that involve alternative utilization of blends of organic surfactants, ligands, capping agents, and plasmonic oleylamine (OLA)-functionalized AuNPs and AgNPs. Ligand exchange with thiol l-cysteine (l-cyst) was used to prepare the hydrophilic nanocrystals. Analysis of the structural properties using powder X-ray diffraction revealed that under the same experimental condition, the plasmonic NPs altered the diffractive crystal structure of the alloyed QDs. Depending on the fabrication strategy, the crystal nature of OLA-AuNP-assisted CdZnSeS QDs was a pure hexagonal wurtzite domain and a cubic zinc-blende domain, whereas the diffraction pattern of OLA-AgNP-assisted CdZnSeS QDs was dominantly a cubic zinc-blende domain. Insights into the growth morphology of the QDs revealed a steady transformation from a heterogeneous growth pattern to a homogenous growth pattern that was strongly influenced by the plasmonic NPs. Tuning the optical properties of the alloyed QDs via plasmonic optical engineering showed that the photoluminescence (PL) quantum yield (QY) of the AuNP-assisted l-cyst-CdZnSeS QDs was tuned from 10 to 31%, whereas the PL QY of the AgNP-assisted l-cyst-CdZnSeS QDs was tuned from 15 to 90%. The low PL QY was associated with the surface defect state, while the remarkably high PL QY exhibited by the AgNP-assisted l-cyst-CdZnSeS QDs lends strong affirmation that the fabrication strategy employed in this work provides a unique opportunity to create single ensemble, multifunctional, highly fluorescent alloyed QDs for tailored biological applications

Hemingway's Women (trans.)

departmental bulletin pape