Highly ordered mesoporous carbons and silicas with ultralarge accessible pores have been successfully synthesized by using laboratory-made poly(ethylene oxide)-b-polystyrene (PEO-b-PS) diblock copolymers as templates via the evaporation-induced self-assembly (EISA) approach. Resols tetraethyl orthosilicate (TEOS) serve carbon silica precursors, respectively. Small-angle X-ray scattering (SAXS) transmission electron microscopy (TEM) measurements show that (denoted C-FDU-18) possess face...

Array of light: Nanostructured arrays NaMF4 (M=rare earth metal) can be prepared by a hydrothermal method. The consist nanoparticles with well-controlled morphologies (tubes, disks, or rods), phases (cubic hexagonal), and sizes (80–900 nm). Multicolor upconversion fluorescence is realized in NaYF4 codoped Er3+ Yb3+ Tm3+ (see picture). Supporting information for this article available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2007/z702519_s.pdf from author. Please note:...

Abstract Plasmonic nanoparticles (NPs), such as Au, Ag, and Cu, are considered promising photothermal materials attract extensive attention for freshwater production by solar steam generation. However, high cost, narrow absorption range and/or poor stability greatly limit their practical applications. Herein, a high‐efficiency energy conversion material consisting of low‐cost non‐metal, extremely thermally‐stable plasmonic TiN NPs hydrophilic semi‐reduced graphene oxide (semi‐rGO), with...

A facile dual-templating approach is demonstrated to prepare hierarchically ordered macro-/mesoporous carbons. Monodispersed silica colloidal crystals are used as a hard template, amphiphilic triblock copolymer PEO−PPO−PEO soft and soluble resols carbon source. The procedure involves packing aging of microspheres, evaporation-induced organic−organic assembly mesostructures in the void thermosetting carbonization phenolic formaldehyde (PF), removal scaffolds by HF. obtained porous carbons...

The near‐infrared (NIR) luminescence properties of Cr 3+ activated Ca 3 Ga 2 Ge O 12 (CGGG) are studied under ultraviolet and visible light excitation. Three types centers associated with 4 T – A transition resulting in the emissions located at 650–1100 nm identified all ‐doped samples. Thanks to occupancy three nonequivalent sites CGGG, NIR is observed peaking about 749, 803, 907 nm, respectively. influence crystal field on site studied, relation between addressed, energy transfer process...

The knowledge of the quantum dot (QD) concentration in a colloidal suspension and quantitative understanding size-dependence band gap QDs are crucial importance from both applied fundamental viewpoints. In this work, we investigate optical properties nearly spherical wurtzite (wz) CuInS2 (CIS) 2.7 to 6.1 nm diameter range (polydispersity ≤10%). synthesized by partial Cu+ for In3+ cation exchange template Cu2- xS nanocrystals, which yields CIS with very small composition variations (In/Cu =...

Abstract Luminescence thermometry is used in a variety of research fields for noninvasive temperature sensing. Lanthanide‐doped micro‐/nanocrystals are exceptionally suitable this. The popular concept luminescence‐intensity‐ratio based on emission from thermally coupled levels single lanthanide ion, following Boltzmann's law. These thermometers can measure with low uncertainty, but only limited range. In this work, Ho 3+ ‐based thermometer presented and quantitatively modeled sustained...

Fine control of the photon emission Eu 2+ activated luminescent materials is essential for advanced optoelectronic applications.

Exploring the evolution of livelihood patterns farm households relocated for poverty alleviation in three prefectures Guizhou Province, China, can provide a theoretical basis and practical value achieving sustainable livelihoods ethnic minority areas. This study took autonomous as research area. The types pathways households’ were divided using 355 tracking monitoring data from four phases livelihoods. characteristics changes their “before relocation” to 2021 analyzed. An indicator system...

Ordered mesoporous nanocrystalline titanium-carbide/carbon composites are synthesized by using a solvent-evaporation-induced self-assembly process combined with in situ carbothermal reduction (see figure). The comprise crystalline titanium carbides confined matrix of amorphous carbon pore walls. nanocomposites possess highly ordered 2D hexagonal mesostructure, large uniform pores, high surface areas and controllable content. TiC nanocrystals enhance the oxidation resistance frameworks....

From polymer templates to mesoporous materials: With the reverse amphiphilic triblock copolymer PPO-PEO-PPO and a resol resin precursor an organic–organic self-assembly process leads formation of ordered carbon mesostructure with face-centered-cubic Fdm symmetry bimodal pores (see scheme). PPO=polypropylenoxide, PEO=polyethylenoxide. Supporting information for this article is available on WWW under http://www.wiley-vch.de/contents/jc_2002/2007/z603665_s.pdf or from author. Please note: The...

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTMesoporous Carbon Single-Crystals from Organic−Organic Self-AssemblyFuqiang Zhang, Dong Gu, Ting Yu, Fan Songhai Xie, Lijuan Yonghui Deng, Ying Wan, Bo Tu, and Dongyuan ZhaoView Author Information Department of Chemistry, Shanghai Key Laboratory Molecular Catalysis Innovative Materials, Fudan University, 200433, P. R. China Cite this: J. Am. Chem. Soc. 2007, 129, 25, 7746–7747Publication Date (Web):June 1, 2007Publication History Received2...

The phosphors of Ca₃Ga₂Ge₃O₁₂ (CGGG) co-doped with Nd³⁺ and Cr³⁺ ions were synthesized using conventional solid-state reaction techniques.

Lanthanide-based photon-cutting phosphors absorb high-energy photons and 'cut' them into multiple smaller excitation quanta. These quanta are subsequently emitted, resulting in photon-conversion efficiencies exceeding unity. The process relies on energy transfer between optically active lanthanide ions doped the phosphor. However, it is not always easy to determine, let alone predict, which energy-transfer mechanisms operative a particular This makes identification design of new promising...

Abstract Numerous investigations have been done in pursuing phosphors with quantum yield (QY) greater than unity terms of downconversion (DC) strategies, as well applications display, lighting, and particularly novel solar cells efficiency exceeding the Shockley–Queisser limit (≈30%). It is significant interest that: i) DC one high‐energy photon to two or more low‐energy photons widely found lanthanide and/or transition‐metal ions activated materials; ii) broadening absorption spanning...

The pore variations of ordered cage-type mesoporous silica FDU-12s have been analyzed in detail by PXRD, SAXS, nitrogen sorption, and electron crystallography. with a cubic symmetry (space group, Fm3̄m) were templated amphiphilic triblock copolymer F127 the addition 1,3,5-trimethylbenzene KCl under an acidic condition. Three typical samples different unit cell sizes, cage diamters, entrance sizes obtained from synthesis hydrothermal treatment temperatures, as indicated differences PXRD SAXS...

Thick wall mesoporous carbons (FDU-18) with ordered large pore structures were synthesized via an evaporation induced self-assembly (EISA) approach by using a novel amphiphilic diblock copolymer weakly hydrophobic segment as template, soluble resol carbon source and THF solvent. The versatile atom transfer radical polymerization (ATRP) method was utilized to prepare the copolymer, poly(ethylene oxide)-b-poly(methyl methacrylate) (PEO-b-PMMA). 1H NMR spectroscopy gel permeation chromatography...

A new class of Ca 5 Ga 6 O 14 :Tb 3+ mechanoluminescent phosphors with trap-independent, self-recoverable mechanoluminescence and a low mechanical stimulus threshold are reported, whose properties originate from piezoelectricity the host giant piezoelectric coefficients.

Upregulation of pyruvate dehydrogenase kinase (PDHK) has been observed in a variety cancers. Inhibition PDHK offers an attractive opportunity for the development novel cancer therapies. To obtain inhibitors, we took advantage homology ATP-binding pocket between Heat Shock Protein 90 (HSP90) and PDHK, utilized 4,5-diarylisoxazole based HSP90 inhibitor structural design. Our efforts led to identification 5k that inhibited PDHK1 with IC50 value 17 nM, which, however, showed marginal cellular...

Cellulose microcrystalline (CMC), a linear polysaccharide with glucosidic bond, was successfully extracted from bamboo powder and modified by 3‐aminopropyltriethoxy silane coupling agent (KH550) to prepare KH550‐CMC. The prepared KH550‐CMC, in association ammonium polyphosphate (APP), introduced into epoxy resin (EP) casting process obtain flame retardant composites. fire performance evaluation indicated that the presence of 10‐phr APP 5‐phr KH550‐CMC EP achieved maximal LOI value 28.9%,...

Abstract Broadband near‐infrared (NIR) phosphors converted light‐emitting diodes (pc‐LEDs) have attracted tremendous attention for their great potential in NIR spectroscopy applications. Herein, we report on the photoluminescence (PL) properties of Cr 3+ ‐doped Sc(PO 3 ) , which exhibits a broadband emission centered at 900 nm with full width half‐maximum (FWHM) 161 upon excitation 480 nm. In terms examination spectroscopic parameters, find that ions occupy weak crystal field site ( Dq / B =...

Development of highly thermally stable broadband near-infrared (NIR) luminescence materials is crucial for advancing the prolonged application smart NIR light sources. In this study, a zero-thermal-quenching and reversible temperature-dependent NIR-emitting Cs2NaAl3F12:Cr3+ phosphor demonstrated, benefiting from its polyhedron-cluster-building rigid structure. The excellent thermal stability rooted in [Al6Na4F45] cluster building unit, which provides structure with weak electron–phonon...