東北大学 · 工学
Hao Wang教授の研究室は、ナノスケールの磁性酸化物や機能性ナノ材料を対象に、低温で形成されるスピンガラス相やコアシェル構造の磁気的性質を解明しています。特に、Fe₃O₄ナノコンパクトにおける交換バイアス効果や冷却磁場依存性の臨界現象を詳細に分析しており、磁性の制御と応用に貢献しています。また、光機能性材料やグラフェン系ナノコンpositesの開発を通じて、バイオセンシングや医療診断への応用も目指しています。
Figures are computed from collected data and may differ slightly.
We have demonstrated a low temperature surface spin-glass layer in the ${\mathrm{Fe}}_{3}{\mathrm{O}}_{4}$ high-pressed nanocompacts. The related core-shell magnetic structure arises during the compaction, which is evident by the field dependence of the freezing temperature following the de Almeida--Thouless relationship and obvious exchange bias effect. Moreover, we have also found a critical cooling field, above which both the surface spin-glass behavior and the exchange bias effect abruptly d
Seed yield (SY) is the most important trait in rapeseed, is determined by multiple seed yield-related traits (SYRTs) and is also easily subject to environmental influence. Many quantitative trait loci (QTLs) for SY and SYRTs have been reported in Brassica napus; however, no studies have focused on seven agronomic traits simultaneously affecting SY. Genome-wide QTL analysis for SY and seven SYRTs in eight environments was conducted in a doubled haploid population containing 348 lines. Totally, 18
Abstract The design of photosensitizers (PSs) with fluorescence in the second near‐infrared (NIR‐II, 1000–1700 nm) window remains a challenge, as the introduction of donor or acceptor units with excessively strong electron‐withdrawing or donating ability leads to longer‐wavelength emission but insufficient production of singlet oxygen ( 1 O 2 ). In this study, a series of acceptor‐donor‐acceptor‐donor‐acceptor‐type PSs are designed by adjusting the steric hindrance of the molecules. Compound BNE
Polymer-functionalized reduced graphene oxide (polymer-FG), produced as individually dispersed graphene sheets, offers new possibilities for the production of nanomaterials that are useful for a broad range of potential applications. Although non-covalent functionalization has produced graphene with good dispersibility and a relatively complete conjugated network, there are few reports related to the effective functionalization of reduced graphene oxide (RGO) using a simple, general method. Here
Using water molecules as a model adsorbing compound, the effect of particle size on the adsorption and desorption properties of porous oxide nanoparticles (NPs) was investigated at different temperatures. The moisture concentration on the surface of NPs was measured by monitoring the infrared spectra peaks corresponding to the stretching vibration of water molecules. A transient multilayer model was developed to represent the fundamental steps in the process. The thermal stability of adsorbed sp
Five fluorescent positively charged poly(<i>para</i>-aryleneethynylene) (<b>P1</b>-<b>P5</b>) were designed to construct electrostatic complexes <b>C1</b>-<b>C5</b> with negatively charged graphene oxide (<b>GO</b>). The fluorescence of conjugated polymers was quenched by the quencher <b>GO</b>. Three electrostatic complexes were enough to distinguish between 12 proteins with 100% accuracy. Furthermore, using these sensor arrays, we could identify the levels of <i>A</i>β40 and Aβ42 aggregates (m
In this letter, high-quality white light-emitting diodes (WLEDs) were fabricated by combining a YAG:Ce <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3+</sup> phosphor-in-glass (PiG) with a red liquid-type quantum dot (LQD). The PiG_LQD-based WLEDs achieve a warm white light with an excellent color rendering index (CRI; Ra = 93.9, R9 = 97.7, and R13 = 98.1) at the current of 100 mA. The corresponding correlated color temperature and luminous effica
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