[原分所] IAMS Lecture Announcement on Dec 23-26
消息來源：原分所
截止日期：2013-12-26
IAMS Lecture Announcement
中研院原分所演講公告
Title: Two-Dimensional Materials Beyond Graphene: Transition Metal Dichalcogenide Monolayers
Speaker: Dr. Lain-Jong Li 李連忠副研究員 (IAMS, Academia Sinica)
Time: 3:00PM, December 23 (Monday)
Place: Dr. Poe Lecture Hall, IAMS (本所浦大邦講堂 臺大校園內)
Contact: Dr. Kuei-Hsien Chen 陳貴賢博士
Abstract: Their direct-gap property of the semiconducting transition metal dichalcogenide monolayers are attractive for optoelectronics, energy harvesting and even for transistors. Here I would like to discuss the synthetic approach to obtain MoS2 (WSe2, MoSe2 and WS2) monolayers directly on arbitrary insulating substrates using vapor phase reaction between metal oxides and S or Se powders. The bandgap tunable monolayer alloy such as MoSxSey or WSxSey can be successfully obtained by the replacement reaction between Se and S. These layer materials can be transferred to desired substrates, making them suitable building blocks for constructing multilayer stacking structures. The significance of charge movement in the emerging field of 2d heterostructures, and the charge distribution strongly affects the properties of the 2d heterostructures. Some possible applications based on these monolayers and 2d heterostructures including flexible transisitors, photodetection and DNA detection shall be discussed.
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IAMS Lecture Announcement
中研院原分所演講公告
Title: Single spins in diamond for sensing and Imaging
Speaker: Dr. Gopalakrishnan Balasubramanian
Max‐Planck Research Group Leader
Max‐Planck Institute for Biophysical Chemistry
Göttingen, Germany
Time: December 25, 2013 (Wednesday), 2:00 pm
Venue: Dr. Poe Lecture Hall (本所浦大邦講堂 臺大校園內)
Contact: Dr. Huan-Cheng Chang 張煥正博士
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IAMS Lecture Announcement
中研院原分所演講公告
Title: Applications of Ab Initio Methods: From Designing 2D Materials to Quantum Nature of Proton Motion
Speaker: Dr. Jer-Lai Kuo 郭哲來博士副研究員 (IAMS, Academia Sinica)
Time: 11:00AM, December 26 (Thursday)
Place: Dr. Poe Lecture Hall, IAMS (本所浦大邦講堂 臺大校園內)
Contact: Dr. Kuei-Hsien Chen 陳貴賢博士
Abstract:
In this talk, I will present recent research activities in our group focusing the applications of ab initio methods on: (1) designing/engineering two-dimensional materials and (2) understanding some quantum aspects of motion of proton in hydrogen-bond network.
After the success of graphene, many 2D and quasi-2D materials, such as BN, transition-metal dichalcogenides (TMD), with different properties have also been synthesized experimentally. To enhance their applications, it is of critical importance to have the ability to tune their properties. We will present some examples of how ab initio methods can be applied to find out ways to open an electronic band gap in graphene based materials by doping small BN domains1, formation of C-BN super-lattices2, and adsorption of aromatic moleculars3. For quasi-2D TMDs (such as MoS2), mechanical strains are promising alternatives, we have also investigate the physics and application of engineering bandgaps of TMDs4. Recently, we start to explore the possibility of 2D materials in the more ionic regions5.
Vibrational predissociation spectra of protonated binary clusters have successfully demonstrated the correlation between location and magnitude of delocalization of the excess proton with the proton affinities of the molecules6,7. Working with our experimental collaborators, we have developed ab intio based algorithms to study some quantum aspects of the motion of proton. In symmetric dimers, the motion of H+ can simply be regarded as a quantum particle trapped in a symmetric well8. By studying a series of protonated binary clusters containing amines, we found that Fermi resonance inevitably shall occur, as the proton affinity will modulate both stretching and bending frequencies of H+.9
[1] X-F Fan, ZX Shen, AQ Liu and J-L Kuo, "Band gap opening of graphene by doping small boron nitride domain", Nanoscale 4, 2157 (2012)
[2] S. Jungthawan, S. Limpijumnong, and J-L Kuo, "Electronic structures of graphene/boron nitride sheet superlattices", Phys. Rev. B 84, 235424 (2011)
[3] C-H Chang, X-F Fan, L-J Li, and J-L Kuo, "Band Gap Tuning of Graphene by Adsorption of Aromatic Molecules", J. Phys. Chem. C 116 13788 (2012)
[4] C-H Chang, X-F Fan, S-H Lin and J-L Kuo, "Orbital analysis of electronic structures and phonon dispersions of monolayers under strains", Phys. Rev. B 88 195420 (2013)
[5] S-H Lin and J-L Kuo, "Towards the ionic limit of two-dimensional materials: monolayer alkaline earth and transition metal halides", (submitted)
[6] T. Hamashima, Y-C Li, C. H. Wu, K. Mizuse, T. Kobayashi, A. Fujii, and J-L Kuo "Folding of the hydrogen bond network of H+(CH3OH)7 with rare gas tagging', J. Phys. Chem. A. 117, 101 (2013)
[7] B. Dan, T. Hamashima, C-W Tsai, A. Fujii, J-L Kuo, "Proton Location in (CH3)3N-H+-(CH3OH)m: A Theoretical and Infrared Spectroscopic Study', Chem. Phys. 421, 1 (2013)
[8] Jake Tan and J-L Kuo, "Quantum Confinement in Symmetric Dimers of (R3N)2H+ and (ROH)2H+", (in preparation)
[9] R. Shishido, C-W Tsai, Jake Tan, A. Fujii and J-L Kuo, "Revealing the hidden dimension of proton motion", (in preparation)
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IAMS Lecture Announcement
中研院原分所演講公告
Title: Protein conformational polymorphism and membrane shape changes underlying the E. coli Min system
Speaker: Dr. Yu-Ling Shih (Inst. of Biological Chemistry, Academia Sinica)
史有伶助研究員 (本院生化所)
Time: 3:30PM, December 26 (Thursday)
Place: Dr. Poe Lecture Hall, IAMS (本所浦大邦講堂 臺大校園內)
Contact: Dr. Kaito Takahashi 高橋開人博士
中研院原分所演講公告
Title: Two-Dimensional Materials Beyond Graphene: Transition Metal Dichalcogenide Monolayers
Speaker: Dr. Lain-Jong Li 李連忠副研究員 (IAMS, Academia Sinica)
Time: 3:00PM, December 23 (Monday)
Place: Dr. Poe Lecture Hall, IAMS (本所浦大邦講堂 臺大校園內)
Contact: Dr. Kuei-Hsien Chen 陳貴賢博士
Abstract: Their direct-gap property of the semiconducting transition metal dichalcogenide monolayers are attractive for optoelectronics, energy harvesting and even for transistors. Here I would like to discuss the synthetic approach to obtain MoS2 (WSe2, MoSe2 and WS2) monolayers directly on arbitrary insulating substrates using vapor phase reaction between metal oxides and S or Se powders. The bandgap tunable monolayer alloy such as MoSxSey or WSxSey can be successfully obtained by the replacement reaction between Se and S. These layer materials can be transferred to desired substrates, making them suitable building blocks for constructing multilayer stacking structures. The significance of charge movement in the emerging field of 2d heterostructures, and the charge distribution strongly affects the properties of the 2d heterostructures. Some possible applications based on these monolayers and 2d heterostructures including flexible transisitors, photodetection and DNA detection shall be discussed.
--------------------------------------------------------------------
IAMS Lecture Announcement
中研院原分所演講公告
Title: Single spins in diamond for sensing and Imaging
Speaker: Dr. Gopalakrishnan Balasubramanian
Max‐Planck Research Group Leader
Max‐Planck Institute for Biophysical Chemistry
Göttingen, Germany
Time: December 25, 2013 (Wednesday), 2:00 pm
Venue: Dr. Poe Lecture Hall (本所浦大邦講堂 臺大校園內)
Contact: Dr. Huan-Cheng Chang 張煥正博士
--------------------------------------------------------------------
IAMS Lecture Announcement
中研院原分所演講公告
Title: Applications of Ab Initio Methods: From Designing 2D Materials to Quantum Nature of Proton Motion
Speaker: Dr. Jer-Lai Kuo 郭哲來博士副研究員 (IAMS, Academia Sinica)
Time: 11:00AM, December 26 (Thursday)
Place: Dr. Poe Lecture Hall, IAMS (本所浦大邦講堂 臺大校園內)
Contact: Dr. Kuei-Hsien Chen 陳貴賢博士
Abstract:
In this talk, I will present recent research activities in our group focusing the applications of ab initio methods on: (1) designing/engineering two-dimensional materials and (2) understanding some quantum aspects of motion of proton in hydrogen-bond network.
After the success of graphene, many 2D and quasi-2D materials, such as BN, transition-metal dichalcogenides (TMD), with different properties have also been synthesized experimentally. To enhance their applications, it is of critical importance to have the ability to tune their properties. We will present some examples of how ab initio methods can be applied to find out ways to open an electronic band gap in graphene based materials by doping small BN domains1, formation of C-BN super-lattices2, and adsorption of aromatic moleculars3. For quasi-2D TMDs (such as MoS2), mechanical strains are promising alternatives, we have also investigate the physics and application of engineering bandgaps of TMDs4. Recently, we start to explore the possibility of 2D materials in the more ionic regions5.
Vibrational predissociation spectra of protonated binary clusters have successfully demonstrated the correlation between location and magnitude of delocalization of the excess proton with the proton affinities of the molecules6,7. Working with our experimental collaborators, we have developed ab intio based algorithms to study some quantum aspects of the motion of proton. In symmetric dimers, the motion of H+ can simply be regarded as a quantum particle trapped in a symmetric well8. By studying a series of protonated binary clusters containing amines, we found that Fermi resonance inevitably shall occur, as the proton affinity will modulate both stretching and bending frequencies of H+.9
[1] X-F Fan, ZX Shen, AQ Liu and J-L Kuo, "Band gap opening of graphene by doping small boron nitride domain", Nanoscale 4, 2157 (2012)
[2] S. Jungthawan, S. Limpijumnong, and J-L Kuo, "Electronic structures of graphene/boron nitride sheet superlattices", Phys. Rev. B 84, 235424 (2011)
[3] C-H Chang, X-F Fan, L-J Li, and J-L Kuo, "Band Gap Tuning of Graphene by Adsorption of Aromatic Molecules", J. Phys. Chem. C 116 13788 (2012)
[4] C-H Chang, X-F Fan, S-H Lin and J-L Kuo, "Orbital analysis of electronic structures and phonon dispersions of monolayers under strains", Phys. Rev. B 88 195420 (2013)
[5] S-H Lin and J-L Kuo, "Towards the ionic limit of two-dimensional materials: monolayer alkaline earth and transition metal halides", (submitted)
[6] T. Hamashima, Y-C Li, C. H. Wu, K. Mizuse, T. Kobayashi, A. Fujii, and J-L Kuo "Folding of the hydrogen bond network of H+(CH3OH)7 with rare gas tagging', J. Phys. Chem. A. 117, 101 (2013)
[7] B. Dan, T. Hamashima, C-W Tsai, A. Fujii, J-L Kuo, "Proton Location in (CH3)3N-H+-(CH3OH)m: A Theoretical and Infrared Spectroscopic Study', Chem. Phys. 421, 1 (2013)
[8] Jake Tan and J-L Kuo, "Quantum Confinement in Symmetric Dimers of (R3N)2H+ and (ROH)2H+", (in preparation)
[9] R. Shishido, C-W Tsai, Jake Tan, A. Fujii and J-L Kuo, "Revealing the hidden dimension of proton motion", (in preparation)
--------------------------------------------------------------------
IAMS Lecture Announcement
中研院原分所演講公告
Title: Protein conformational polymorphism and membrane shape changes underlying the E. coli Min system
Speaker: Dr. Yu-Ling Shih (Inst. of Biological Chemistry, Academia Sinica)
史有伶助研究員 (本院生化所)
Time: 3:30PM, December 26 (Thursday)
Place: Dr. Poe Lecture Hall, IAMS (本所浦大邦講堂 臺大校園內)
Contact: Dr. Kaito Takahashi 高橋開人博士