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學術成就

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學術亮點

堀江正樹教授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體開關
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


本研究發現了一個由二茂鐵超分子晶體所組成的光致超分子開關,藉由便捷的控制445 nm雷射光的照射與否,我們可以觀察到晶體的明顯擴大/收縮現象,此現象為一個可逆變化,也就是說當我們移除雷射光後,晶體能夠迅速的恢復到原先的狀態,並且重複擴大/收縮數百、數千次完全沒有問題。這個有趣的光致行為被我們用來做一些遙控物體的展演:像是透過晶體的厚度方向擴張來傳球、或是藉由重覆的晶體擴張/收縮行為來與電路相接成為一個新穎的分子晶體開關。我們期待這類靠著簡單分子間作用力行為的光致超分子能夠在分子機器和光電元件領域中有更多、更廣泛的運用。

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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胡育誠教授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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馬振基教授 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 cm2 ) 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.

 本研究提出一種一步法製備之陽極複合沉積技術,並使用不銹鋼片以及石墨紙做為承載基材,分別發展固態電極及可撓曲式電極。在最佳沉積條件下,不銹鋼-石墨烯-錳氧化物電極(a-MnOx/rGO-CNT1V-steel)具高比電容(在5 mV s-1時可達440 F g-1)以及優良的電容維持率(1000 mV s-1時達60%)。一個由活性碳負電極以及a-MnOx/rGO-CNT1V正電極所組成的非對稱超級電容可於比功率(specific power, SP)在1 kW kg-1時提供18 Wh kg1的高比能量(specific energy, SE)。此非對稱超級電容之SE在相當高SP32 kW kg1)時可達到5.1 Wh kg1。而石墨紙-石墨烯-錳氧化物電極(a-MnOx/rGO-CNT1V-graphite paper)則與a-MnOx/rGO-CNT1V-steel之電容表現(5 mV s-1時可達431 F g-1)相近,並具有可撓曲性質。
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胡啟章教授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.

具備金屬導電性之結晶性二氧化釕奈米管(與二氧化釕底層),提供在電荷儲存與釋放時電子的【高速公路】。而且二氧化釕奈米管的陣列式多孔構造,能夠大幅地降低電解質的穿透阻力。同時二氧化釕的水合本質也提升了儲能過程中質子交換的速率。


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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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呂世源教授 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奈米粒子負載ZnFe2O4光觸媒為一價廉、穩定、磁力可回收之光觸媒, 在類Fenton光催化降解頑強有機汙染物程序中展現超高降解效率
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何榮銘教授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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藉由網狀結構的位移達成亞對稱型態性質 — 一個關於仿生蝴蝶翅膀的故事

此研究以雙連續螺旋體(double gyroid)為一模型系統,藉由其網狀結構產生的物理性位移(shifting networks),形成具有類-單連續螺旋體,此一結構類似蝴蝶翅膀,具有選擇性反射日光的光子晶體特性。在此篇論文中,何榮銘教授與同事們提出一個創新的方法,那就是降低原先材料的空間高對稱型態,形成新的網狀材料。聚苯乙烯-聚左旋乳酸嵌段共聚物(polystyrene-b-poly(L-lactide) (PS-PLLA))具自組裝的特性,在此研究中被用來展現原先具高對稱型態的材料,在經過物理性位移後,轉變成具有亞對稱型態的新材料。經由水解除去聚乳酸鏈段後,即可形成具有多孔性的PS塊材,並以此塊材為模板,於奈米孔洞中進行溶膠凝膠反應(sol-gel process) 。隨後,經由加熱軟化高分子基材,其雙連續螺旋體型態之網狀結構將產生物理性位移,兩個獨立互穿的單連續螺旋結構將彼此靠近、接觸而形成穩固的類-單連續螺旋結構。再移除PS模板之後,獨立的類-單連續螺旋結構將被製備並具有奈米光子晶體特性。此一方法藉由亞對稱型態的轉換,提供了一材料平台來製備具獨特結構與性質的網狀材料。詳見5月出刊的Advanced Materials, Vol. 26, 3225 (2014)。本研究獲選為該期封面故事。 Shifting Networks to Achieve Subgroup Symmetry PropertiesA 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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劉英麟教授 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.

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