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  • 陳應誠 博士
    Phys. Rev. Lett. 120, 183602 (2018).
    Quantum memory is a device that can store and then retrieve a quantum state on demand. It is an important building block in long-distance quantum communication. To outperform the direct transmission of photons with quantum repeaters, it is crucial to develop quantum memories with high fidelity, high efficiency and a long storage time. We achieved a storage efficiency of 92.0 % for a coherent optical memory based on the electromagnetically induced transparency scheme in optically dense cold atomic media. We also obtain a useful time-bandwidth product of 1200, considering only storage where the retrieval efficiency remains above 50 %. Both are the best record to date in all kinds of the schemes for the realization of optical memory. Our work significantly advances the pursuit of a high-performance optical memory and should have important applications ...
  • 陳貴賢 博士
    NATURE COMMUNICATIONS (DOI: 10.1038/s41467-017-02547-4, 2018)
    Carbon-doped SnS2 (SnS2-C) metal dichalcogenide nanostructure has been synthesized using a hydrothermal technique, which exhibits a highly active and selective photocatalytic conversion of CO2 to hydrocarbons under visible-light, attaining a photochemical quantum efficiency of above 0.7%. The SnS2 -C photocatalyst represents an important contribution towards high quantum efficiency artificial photosynthesis based on gas phase photocatalytic CO2 reduction under visible light.
  • 謝佳龍 博士
    ACS Nano, 11(3), 2575–2585 (2017).
    Viral infection starts with a virus particle landing on a cell surface followed by penetration of the plasma membrane. Due to the difficulty of measuring the rapid motion of small-sized virus particles on the membrane, little is known about how a virus particle reaches an endocytic site after landing at a random location. Here, we use coherent brightfield (COBRI) microscopy to investigate early-stage viral infection with ultrahigh spatiotemporal resolution. By detecting intrinsic scattered light via imaging-based interferometry, COBRI microscopy allows us to track the motion of a single vaccinia virus particle with nanometer spatial precision (< 3 nm) in 3D and microsecond temporal resolution (up to 100,000 frames per second). We explore the possibility of differentiating the virus signal from cell background based on their distinct spatial and  ...
  • 劉國平 博士
    Nature Chemistry, 9, 1175-1180 (2017).
    The transition state, which gates and modulates the reactive flux, serves as the central concept in our understanding of activated reactions. The barrier height of the transition state can be estimated from the activation energy taken from thermal kinetics data or from the energetic threshold in the measured excitation function (the dependence of reaction cross sections on initial collision energies). However, another critical and equally important property, the angle-dependent barrier to reaction, has not yet been amenable to experimental determination until now. Here, using the benchmark reaction of Cl + CHD3(v1 = 1) as an example, we show how to map this anisotropic property of the transition state as a function of collision energy from the preferred reactant bond alignment of the backward-scattered products ‒ the imprints of small  ...
  • 楊大衍 博士
    Scientific Reports 7, 39792 (2017).
    Proteins are of interest in nano-bio electronic devices due to their versatile structures, exquisite functionality and specificity. However, quantum transport measurements produce conflicting results due to technical limitations whereby it is difficult to precisely determine molecular orientation, the nature of the moieties, the presence of the surroundings and the temperature; in such circumstances a better understanding of the protein electron transfer (ET) pathway and the mechanism remains a considerable challenge. Here, we report an approach to mechanically drive polypeptide flip-flop motion to achieve a logic gate with ON and OFF states during protein ET. We have calculated the transmission spectra of the peptide-based molecular junctions and observed the hallmarks of electrical current and conductance. The results indicate that peptide ET fol ...
  • 張煥正 博士
    Angew. Chem. Int. Ed. 56, 3025–3030 (2017).
    Much of the current understanding of thermal effects in biological systems is based on macroscopic measurements.  There is little knowledge about the local thermostability or heat tolerance of subcellular components at the nanoscale.  Herein, we show that gold nanorod-fluorescent nanodiamond (GNR-FND) hybrids are useful as a combined nanoheater-nanothermometer in living cells.  With the use of a 594 nm laser for both heating and probing, we measured the temperature changes by recording the spectral shifts of the zero-phonon lines of negatively charged nitrogen-vacancy centers in FNDs.  The technique allows us to determine the rupture temperatures of individual membrane nanotubes in human embryonic kidney cells, as well as to generate high temperature gradients on the cell membrane for photoporation and optically controlled hyper ...
  • 高橋開人 博士
    Physical Chemistry Chemical Physics, 20, 20217-20227 (2018).
    Criegee intermediates (CIs), formed in the reactions of unsaturated hydrocarbons with ozone, are very reactive carbonyl oxides and have recently been suggested as important oxidants in the atmosphere. In this work, we studied the substituent effect on the water monomer and dimer reaction with CIs which include up to three carbon atoms at the QCISD(T)/CBS//B3LYP/6-311+G(2d,2p) level. Our calculation showed that for saturated CIs with a hydrogen atom on the same side as the terminal oxygen atom, the reaction with water vapor would likely dominate the removal processes of these CIs in the atmosphere. On the other hand, for unsaturated CIs, the reactivity toward water vapor decreases compared to the saturated species allowing them to survive in humid atmospheric environments. We also evaluated the kinetic isotope effect in the reaction between CI and w ...
  • 余慈顏 博士
    Scientific Reports, 8, 13501 (2018).
    Incorporating membrane proteins into membrane mimicking systems is an essential process for biophysical studies and structure determination. Monodisperse lipid nanodiscs have been found to be a suitable tool, as they provide a near-native lipid bilayer environment. Recently, a covalently circularized nanodisc (cND) assembled with a membrane scaffold protein (MSP) in circular form, instead of conventional linear form, has emerged. Covalently circularized nanodiscs have been shown to have improved stability, however the optimal strategies for the incorporation of membrane proteins, as well as the physicochemical properties of the membrane protein embedded in the cND, have not been studied. Bacteriorhodopsin (bR) is a seven-transmembrane helix (7TM) membrane protein, and it forms a two dimensional crystal consisting of trimeric bR on the purple membra ...
  • 廖仲麒 博士
    Nature Communications, 9, 2023 (2018).
    Distal appendages (DAPs) are nanoscale, pinwheel-like structures protruding from the distal end of the centriole that mediate membrane docking during ciliogenesis, marking the cilia base around the ciliary gate. Here we determine a super-resolved multiplex of 16 centriole-distal-end components. Surprisingly, rather than pinwheels, intact DAPs exhibit a cone-shaped architecture with components filling the space between each pinwheel blade, a new structural element we term the distal appendage matrix (DAM). Specifically, CEP83, CEP89, SCLT1, and CEP164 form the backbone of pinwheel blades, with CEP83 confined at the root and CEP164 extending to the tip near the membrane-docking site. By contrast, FBF1 marks the distal end of the DAM near the ciliary membrane. Strikingly, unlike CEP164, which is essential for ciliogenesis, FBF1 is required for ciliary ...
  • 許良彥 博士
    Nano Lett. (DOI: 10.1021/acs.nanolett.8b01838, 2018)
    In this study, we explore photoinduced electron transport through a molecule weakly coupled to two electrodes by combining first-principles quantum chemistry calculations with a Pauli master equation approach that accounts for many-electron states. In the incoherent limit, we demonstrate that energy-level alignment of triplet and charged states plays a crucial role, even when the rate of intersystem crossing is much smaller than the rate of fluorescence. Furthermore, the field intensity dependence and an upper bound to the photoinduced electric current can be analytically derived in our model. Under an optical field, the conductance spectra (charge stability diagrams) exhibit unusual Coulomb diamonds, which are associated with molecular excited states, and their widths can be expressed in terms of energies of the molecular electronic states. This s ...
  • 曾文碧 博士
    Chem. Eur. J., 23, 13669-13675 (2017).
    High-resolution mass-analyzed threshold ionization (MATI) spectra of (h6-Ph2)2Cr and (h6-Ph2)(h6-PhMe)Cr demonstrate that the Ph groups work as electron donors, decreasing the ionization energy of the gas-phase bisarene complexes. In contrast to electrochemical data, a close similarity of the Ph and Me group effects on the oxidation of free sandwich molecules has been revealed. However, DFT calculations testify for the opposite shifts of the electron density caused by the Me and Ph substituents in the neutral complexes, the latter behaving as an electron-accepting fragment. On the contrary, in the bisarene cations, the Ph group becomes a stronger donor than methyl. This change provides the similar substituent effects observed with the MATI experiment. On the other hand, the well-documented opposite influence of the Me and Ph fragments on the redox  ...



Ultrafast thermal transport under extreme conditions: from 2D thermoelectrics to Earth materials
謝文斌副研究員, 本院地球科學研究所
2018-11-22 下午 03:30  浦大邦紀念講堂
(To be announced)
李遠哲院士, 中央研究院
2018-11-29 下午 03:30  浦大邦紀念講堂
(To be announced)
梁永成副教授, 國立成功大學物理學系
2018-12-13 下午 03:30  浦大邦紀念講堂
In-situ realize the photo/electrochemical behaviors of metal center in liquid environment
陳浩銘助理教授, 國立臺灣大學化學系
2018-12-27 下午 03:30  浦大邦紀念講堂
Expedite random structure searching using objects from Wyckoff positions
魏金明博士, 本所特聘研究員
2019-01-03 下午 03:30  浦大邦紀念講堂


2018-11-23 上午 09:30 ~ 下午 05:00
10th Asian Photochemistry Conference
2018-12-16 下午 06:00 ~ 2018-12-20 下午 04:00
Established in 1996, the Asian Photochemistry Conference (APC) aims to provide scientists a major forum to discuss their latest developments in fundamental and applied photochemistry and related research areas. The APC has been successfully held in various countries including Australia, China, India, Japan, Korea, New Zealand, Singapore, and Taiwan. The 10th Asian Photochemistry Conference (APC 2018) is organized by Academia Sinica and National Taiwan University. The Organizing Committee welcomes you to participate in APC 2018 to be held in the Howard Civil Service International House, Taipei, Taiwan on 16-20 December, 2018.
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最後更新於 2018-11-07 15:57:54