Materials Literature
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We characterize plasmonic enhancement in a hotspot between two Au nanodisks using Raman scattering of graphene. Single layer graphene is suspended across the dimer cavity and provides an ideal two-dimensional test material for the local near-field distribution. We detect a Raman enhancement of the order of 10(3) origi…
Chloride-terminated, tri- n -butylphosphine (Bu 3 P) bound CdSe nanocrystals were prepared by cleaving carboxylate ligands from CdSe nanocrystals (2.5 carboxylate/nm 2 ) with chlorotrimethylsilane in Bu 3 P solution. 1 H and 31 P{ 1 H} nuclear magnetic resonance (NMR) spectra of the isolated nanocrystals allowed assig…
Superparamagnetic iron oxide nanoparticles (SPIONs) have been widely used experimentally and also clinically tested in diverse areas of biology and medicine. Applications include magnetic resonance imaging, cell sorting, drug delivery, and hyperthermia. Physicochemical surface properties are particularly relevant in t…
π-Conjugated organic luminophores are one of the essential ingredients for modern optoelectronics. This short review highlights recent research progress on a type of smart π-conjugated systems based on cyanostilbene and its derivatives, in which their photophysical properties can be tuned in response to a variety of e…
In this paper, we have systematically studied the structural and electronic properties of vacancy defects and carbon impurity in hexagonal boron nitride ($h$-BN) by using both normal GGA calculations and advanced hybrid functional calculations. Our calculations show that the defect configurations and the local bond le…
Single-chain magnets (SCMs) are one-dimensional (1D) slow-relaxing magnetic chains with interesting fundamental properties and applications, such as information storage. The mechanism underlying the slow relaxation of SCMs is Glauber dynamics, in which R. J. Glauber proposed about 50 years ago that the 1D correlation…
The pre-existing Fermi level alignment between ZnO and CuSCN semiconductors gives rise to the two key elements needed for a self-powered, binary-response UV- sensor: photovoltaic behavior and low turn-on bias. Nanosecond response times, self-powered performance, and long-term stability, coupled with scalable, inexpens…
Colloidal hollow nanocrystals with controlled hollow interior and shell thickness represent a class of important nanostructured materials, because of their promising applications for nanoreactors, drug delivery, and catalysis. Since the first report in 2004 on the synthesis of CoS and CoO hollow nanocrystals by sulfid…
We report the mechanical strength of native cellulose nanofibrils. Native cellulose nanofibrils, purified from wood and sea tunicate, were fully dispersed in water via a topochemical modification of cellulose nanofibrils using 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO) as a catalyst. The strength of individual nano…
Using $GW$ first-principles calculations for few-layer and bulk MoS${}_{2}$, we study the effects of quantum confinement on the electronic structure of this layered material. By solving the Bethe-Salpeter equation, we also evaluate the exciton energy in these systems. Our results are in excellent agreement with the av…
The selective ion penetration and water purification properties of freestanding graphene oxide (GO) membranes are demonstrated. Sodium salts permeated through GO membranes quickly, whereas heavy-metal salts infiltrated much more slowly. Interestingly, copper salts were entirely blocked by GO membranes, and organic con…
Abstract A controllable one‐pot method to synthesize N‐doped ordered mesoporous carbons (NMC) with a high N content by using dicyandiamide as a nitrogen source via an evaporation‐induced self‐assembly process is reported. In this synthesis, resol molecules can bridge the Pluronic F127 template and dicyandiamide via hy…
Ins Blaue hinein: Das gelbe elektrochrome Copolymer Propylendioxythiophenphenylen, P(ProDOT-Ph), wurde durch den Prozess der Mikroformung in Kapillaren (MIMIC) mit einem Liniengitter versehen. Unter Weißlichtbestrahlung resultieren durch Beugung Farben, die sich durch Anlegen einer äußeren Spannung verändern lassen (s…
The objectives of the research were to study the effect of HAF/SRF black ratio and the loading of sulfur on vulcanization characteristic, swelling behaviour and compression set of NBR vulcanizates. The ratio of HAF/SRF were 0/70; 10/60; 20/50; 30/40; 35/35; 40/30; 50/20 and 70/0 phr, respectively. The observation of t…
Composites consisting of 70 vol% ZrB 2 and 30 vol% α‐ SiC particles were hot pressed to near full density and subsequently annealed at temperatures ranging from 1000°C to 2000°C. Strength, elastic modulus, and hardness were measured for as‐processed and annealed composites. Raman spectroscopy was employed to measure t…
This paper presents a low-temperature route for producing RFe0.6Ni0.4O3 (where R = Pr, Nd and Sm) thin films by an aqueous inorganic sol-gel process. The films produced were characterized by X-ray diffraction (XRD) for structural, four probes for electrical and UV-vis spectroscopy for optical properties. As-deposited…
Currently, because of the wide use of magnetic/metal hybrid materials in the field of surface‐enhanced Raman scattering (SERS), magnetic fields (MFs) as a kind of surrounding environments of SERS substrates have been not ignored. And enormous attentions for the effect of MFs on SERS are very necessary. Our analysis fr…
2-(1′-Pyrenyl)nitronylnitroxide (PyrNN) forms a 2 : 1 : 2 co-crystal with octafluoronaphthalene (OFN) and entrained solvent dichloromethane (DCM), in which the radical is “shepherded” into forming chains of radical–radical contacts on the peripheries of (PyrNN–OFN–PyrNN)n π-stacks, giving weak, low dimensional inter-r…
Abstract Single crystalline strontium chloroborate (Sr 2 B 5 O 9 Cl) whiskers with uniform diameter have been synthesized by a facile route based on the calcination of precursor. The precursor was prepared by the sedimentation reaction between SrCl 2 and Na 2 B 4 O 7 aqueous solution. The products were characterized b…
Abstract Novel temperature and pH dual‐responsive dendritic polyoligomeric silsesquioxane (POSS)–poly( N ‐isopropylacrylamide) (PNIPAm)–poly(2‐hydroxyethyl methacrylate) (PHEMA) copolymers are prepared via atom transfer radical polymerization and click reactions. The cloud points ( T c ) decrease with decreasing pH fr…