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堀江正树教授Masaki Horie

 Article, 3 November 2016, open
Nature Communications, digital object identifier (DOI) number: 10.1038/NCOMMS13321.

快速且可逆的光致超分子晶体开关
Rapid and reversible photoinduced switching of a rotaxane crystal
Kai-Jen Chen, Ya-Ching Tsai, Yuji Suzaki, Kohtaro Osakada,Atsushi Miura and Masaki Horie*

Department of Chemical Engineering, National Tsing Hua University


本研究发现了一个由二茂铁超分子晶体所组成的光致超分子开关,借由便捷的控制445 nm雷射光的照射与否,我们可以观察到晶体的明显扩大/收缩现象,此现象为一个可逆变化,也就是说当我们移除雷射光后,晶体能够迅速的恢复到原先的状态,并且重复扩大/收缩数百、数千次完全没有问题。这个有趣的光致行为被我们用来做一些遥控物体的展演:像是透过晶体的厚度方向扩张来传球、或是借由重复的晶体扩张/收缩行为来与电路相接成为一个新颖的分子晶体开关。我们期待这类靠着简单分子间作用力行为的光致超分子能够在分子机器和光电元件领域中有更多、更广泛的运用。

We discovered the mechanical switching of crystals of ferrocene-containing rotaxane controlled by laser light. The expansion and contraction of the crystals can be driven by turning on and off laser light at 445 nm. The expansions reversibly occur and have the advantage of a rapid relaxation process. This molecular crystal behaviour induced by laser irradiation, is demonstrated for the remote control of objects, namely, microparticle transport and microswitching in an electric circuit. We anticipate that such photoinduced molecular motions will have more applications in molecular mechanical and optoelectric devices based on the simple integration of molecular building blocks.
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胡育诚教授Yu-Chen Hu

 K. C. Li,  Y. H. Chang, C. L. Yeh, Y. C. Hu*, "Healing of Osteoporotic Bone Defects by Baculovirus-Engineered Bone Marrow-derived MSCs Expressing MicroRNA Sponges", Biomaterials, In Press, Available online 2 October 2015

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马振基教授 Chen-Chi M. Ma

Wang, Y. S., Li, S. M., Hsiao, S. T., Liao, W. H., Yang, S. Y., Ma, C. C. M., & Hu, C. C. (2015). Electrochemical composite deposition of porous cactus-like manganese oxide/reduced graphene oxide–carbon nanotube hybrids for high-power asymmetric supercapacitors. Journal of Materials Chemistry C3(19), 4987-4996.

 

 Electrochemical composite deposition of porous cactus-like manganese oxide/reduced graphene oxide–carbon nanotube hybrids for high-power asymmetric supercapacitors

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This paper proposes a simple, one-step, two-electrode electrochemical composite deposition for fabricating amorphous manganese oxide/graphene–carbon nanotube (a-MnOx/rGO–CNT) hybrids. The a-MnOx/ rGO–CNT hybrids were simultaneously deposited onto steel substrates by using dodecylbenzene-sulfonic acid and controlling the cell voltage. The cell voltage affected the deposition rates of manganese oxide (driven by the concentration gradient) and carbon materials (driven by the potential gradient). The mass ratio of a-MnOx to rGO–CNT, controlled by the cell voltage, affected the morphology, microstructure, and capacitive behavior of a-MnOx/rGO–CNT. Under the optimal cell voltage (=1.25 V), an a-MnOx/rGO–CNT electrode exhibited a cactus-like a-MnOx nanostructure, an even dispersion of a-MnOx within the rGO–CNT, and a highly porous structure, yielding the highest outer charge (296.5 C g-1 0.0em 2 ) among all a-MnOx/rGO–CNT electrodes. In addition, a-MnOx/rG-CNT1.25V exhibited a high specific capacitance (440 F g1 at 5 mV s-1 ) and excellent capacitance retention (60% at 1000 mV s-1 ). An asymmetric supercapacitor consisting of a commercial activated carbon negative electrode and an a-MnOx/rGO–CNT1.25V positive electrode provided a high specific energy (SE) of 18 W h kg1 at a specific power (SP) of 1 kW kg-1 . The SE of this asymmetric supercapacitor reached 5.1 W h kg1 at a very high SP of 32 kW kg-1.

 本研究提出一种一步法制备之阳极复合沉积技术,并使用不锈钢片以及石墨纸做为承载基材,分别发展固态电极及可挠曲式电极。在最佳沉积条件下,不锈钢-石墨烯-锰氧化物电极(a-MnOx/rGO-CNT1V-steel)具高比电容(在5 mV s-1时可达440 F g-1)以及优良的电容维持率(1000 mV s-1时达60%)。一个由活性碳负电极以及a-MnOx/rGO-CNT1V正电极所组成的非对称超级电容可于比功率(specific power, SP)在1 kW kg-1时提供18 Wh kg1的高比能量(specific energy, SE)。此非对称超级电容之SE在相当高SP32 kW kg1)时可达到5.1 Wh kg1。而石墨纸-石墨烯-锰氧化物电极(a-MnOx/rGO-CNT1V-graphite paper)则与a-MnOx/rGO-CNT1V-steel之电容表现(5 mV s-1时可达431 F g-1)相近,并具有可挠曲性质。
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胡启章教授Chi-Chang Hu
C.C. Hu*, K.H. Chang, M.C. Lin, Y.T. Wu, “Design and Tailoring of the Nanotubular Arrayed Architecture of Hydrous RuO2 for Next Generation Supercapacitors”, Nano Lett., 6(12), 2690 (2006).




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The crystalline RuO2×xH2O nanotubes (and the RuO2×xH2O underlayer) with metallic conductivity provide the electron “superhighways” for charge storage and delivery. The arrayed, porous architecture of RuO2×xH2O nanotubes substantially reduces the resistance of electrolyte penetration. The hydrous nature of RuO2×xH2O promotes the rate of proton exchange.

具备金属导电性之结晶性二氧化钌奈米管(与二氧化钌底层),提供在电荷储存与释放时电子的【高速公路】。而且二氧化钌奈米管的阵列式多孔构造,能够大幅地降低电解质的穿透阻力。同时二氧化钌的水合本质也提升了储能过程中质子交换的速率。


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宋信文教授 Hsing-Wen Sung

 C.W. Hsiao, H.L. Chen, Z.X. Liao, R, S. Sureshbabu, C.H. Hsiao, S.J. Lin, Y. Chang*, H.W Sung*, “Effective photothermal killing of pathogenic bacteria by using spatially tunable colloidal gels with nano-localized heating sources,” Adv. Funct. 25(5), 721-728 (2014).1315_71b4a034.jpg

Alternative approaches to treating subcutaneous abscesses—especially those associated with antibiotic-resistant pathogenic bacterial strains—that eliminate the need for antibiotics are urgently needed. This work descibes a chitosan (CS) derivative with self-doped polyaniline (PANI) side chains that can self-assemble into micelles in an aqueous environment and be transformed into colloidal gels in a process that is driven by a local increase in pH. These self-doped PANI micelles can be utilized as nano-localized heat sources, remotely controllable using near-infrared (NIR) light. To test the in vivo efficacy of the CS derivative as a photothermal agent, an aqueous solution thereof is directly injected at the site of infected abscesses in a mouse model. The injected polymer solution eventually becomes distributed over the acidic abscesses, forming colloidal gels when it meets the boundaries of healthy tissues. After treatment with an 808 nm laser, the colloidal gels convert NIR light into heat, causing the thermal lysis of bacteria and repairing the infected wound without leaving residual implanted materials. This approach has marked potential because it can provide colloidal gels with tunable spatial stability, limiting localized heating to the infected sites, and reducing thermal damage to the surrounding healthy tissues.
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吕世源教授 Shih-Yuan Lu
K.T. Lee, X.F. Chuah, Y.C. Cheng, S.Y. Lu*,
Pt coupled ZnFe204 nanocrystals as a breakthrough photocatalyst for Fenton-like processes- photodegradation treatments from hours to seconds, J. Mater. Chem. A, 3, 18578-18585 (2015).

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Highlight:

Pt coupled ZnFe2O4 nanocrystals, a breakthrough photocatalyst for Fenton like processes, enable substantial shortening of photocatalytic degradation treatment time.

Pt奈米粒子负载ZnFe2O4光触媒为一价廉、稳定、磁力可回收之光触媒, 在类Fenton光催化降解顽强有机污染物程序中展现超高降解效率
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何荣铭教授Rong-Ming Ho
H. Y. Hsueh, Y. C. Ling, H. F. Wang, L. Y. Chang Chien, Y. C. Hung, E. L. Thomas, R. M. Ho*, “Shifting Networks to Achieve Subgroup Symmetry Properties”, Adv. Mater. 26, 3225-3229 (2014).

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借由网状结构的位移达成亚对称型态性质 — 一个关于仿生蝴蝶翅膀的故事


此研究以双连续螺旋体(double gyroid)为一模型系统,借由其网状结构产生的物理性位移(shifting networks),形成具有类-单连续螺旋体,此一结构类似蝴蝶翅膀,具有选择性反射日光的光子晶体特性。在此篇论文中,何荣铭教授与同事们提出一个创新的方法,那就是降低原先材料的空间高对称型态,形成新的网状材料。聚苯乙烯-聚左旋乳酸嵌段共聚物(polystyrene-b-poly(L-lactide) (PS-PLLA))具自组装的特性,在此研究中被用来展现原先具高对称型态的材料,在经过物理性位移后,转变成具有亚对称型态的新材料。经由水解除去聚乳酸链段后,即可形成具有多孔性的PS块材,并以此块材为模板,于奈米孔洞中进行溶胶凝胶反应(sol-gel process) 。随后,经由加热软化高分子基材,其双连续螺旋体型态之网状结构将产生物理性位移,两个独立互穿的单连续螺旋结构将彼此靠近、接触而形成稳固的类-单连续螺旋结构。再移除PS模板之后,独立的类-单连续螺旋结构将被制备并具有奈米光子晶体特性。此一方法借由亚对称型态的转换,提供了一材料平台来制备具独特结构与性质的网状材料。

详见5月出刊的Advanced Materials, Vol. 26, 3225 (2014)。本研究获选为该期封面故事。

Shifting Networks to Achieve Subgroup Symmetry Properties

A simple method for the preparation of nanomaterials with new functionality by physical displacement of a network phase is suggested, giving a change in space group symmetry and hence properties. A double gyroid structure made by the self-assembly of block copolymers is used as a model system for the demonstration of shifting networks to achieve single gyroid-like scattering properties. Freestanding single gyroid-like network materials can be fabricated to give nanophotonic properties, imilar to the photonic properties of a butterfly wing structure.

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刘英麟教授 Ying-Ling Liu

H.Y. Li, Y.Y. Lee, Y. Chang. C.H. Lin, Y.L. Liu*, “Robustly blood-inert and shape-reproducible electrospun polymeric mats”, Adv. Mater. Interfaces 2(9), 1500065 (2015).


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In this work, we report a convenient and scalable
approach for preparation of multi-functional porous materials showing robustly blood-inertness, water-pinning ability, and shape reproducibility.