Institute of Atomic and molecular Sciences (English version)

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Highlights

Graphene Modified LiFePO₄ Cathode for Lithium Ion Battery beyond Theoretical Capacity

Nature Communications (9-Apr-2013)

Graphene Modified LiFePO4 Cathode for Lithium Ion Battery beyond Theoretical Capacity

The specific capacity of commercially available cathode carbon coated LiFePO₄is typically 120-160 mAh g^-1, lower than the theoretical value 170 mAh g^-1. We discover that the carbon coated LiFePO₄surface-modified with 2 wt% of the electrochemically exfoliated graphene layers is able to reach 208 mAh g^-1 in specific capacity. The excess capacity is attributed to the reversible reduction-oxidation reaction between the lithium ions of the electrolyte and the exfoliated graphene flakes. The highly conductive grapheneflakes wrapping ... (Read More)

Assessment of density functional theory to calculate phase transition pressure of ice at 0K

Physical Chemistry Chemical Physics 14, 11484-11490

To assess the accuracy of density functional theory (DFT) methods in describing hydrogen bonding in condensed phases, we benchmarked their performance in describing phase transitions among different phases of ice. We performed DFT calculations of ice for phases Ih, II, III, VI and VII using BLYP, PW91, PBE, PBE-D, PBEsol, B3LYP, PBE0, and PBE0-D, and compared the calculated phase transition pressures between Ih-II, Ih-III, II-VI, and VI-VII with the 0 Kelvin experimental values of Whalley [J. Chem. Phys. 1984, 81,4087]. From the geometry optimization of many dif ... (Read More)

Synthesis of Optical Field Waveforms

Science, 331, 1165-1168 (2011).

Function generators are pieces of electronic equipment or software that are used to generate waveforms. They can produce sine, sawtooth, square, triangular and even sophisticated arbitrary signals, and are important pieces of electronic testing equipment that are used in many scientific experiments and instrumentation development. However, they can only generate waveforms in the microwave to radio wave range. Current function generators utilize electrical circuit to generate waveforms, a method that can not be used on optical waveforms as electrons move more slowly than light. The development ... (Read More)

Vitalizing fuel cells with a vitamin: pyrolyzed vitamin B12 as non-precious catalyst for enhanced oxygen reduction reaction

Energy & Environmental Science 5 (2012), 5305-5314

The limited natural abundance and high cost of Pt has been a major barrier in its applications for hydrogen fuel cells. In this work, based on the pyrolyzed vitamin B12 (py-B12/C), it is reported to produce superior catalytic activity in the oxygen reduction reaction (ORR) with an electron transfer number of 3.90, which is very close to the ideal case of 4. The H2–O2 fuel cell using py-B12/C provides a maximum power density of 370 mW/cm² and a current density of 0.720 A/cm² at 0.5 V at 70 ^o ... (Read More)

Label-free detection of protein-protein interactions using a calmodulin-modified nanowire transistor

Proc. Natl. Acad. Sci. U. S. A., 107, 1047-1052 (2010)

In this study, we describe a highly sensitive and reusable silicon nanowire field-effect transistor for the detection of protein-protein interactions. This reusable device was made possible by the reversible association of glutathione S-transferase-tagged calmodulin with a glutathione modified transistor. The calmodulin-modified transistor exhibited selective electrical responses to Ca²⁺ (≥1 μM) and purified cardiac troponin I (∼7 nM); the change in conductivity displayed a linear dependence on the concentration of troponin I in a range from 10 nM to 1 μM. These results ... (Read More)

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News

2013-06-04	Congratulations to Dr. Lain-Jong Li on receiving 2013 Academia Sinica Research A ... (more)
2013-03-05	Congratulations to Dr. Mei-Yin Chou on receiving 2013 Taiwan Outstanding women in Science Award.
2013-02-22	Congratulations to following winners on receiving 2012 IAMS Annual Award for Out ... (more)
2013-02-19	Congratuations to Chih-Yuan Huang, Chun-Chia Chen, Keng-Shuo Wu, Guan-Bo Liao, H ... (more)
2013-01-09	Congratulations to Mr. Han-Sung Chan (Dr. Andy Kung Group) on receiving 2012 Exc ... (more)
2013-01-09	Congratulations to Dr. Kuei-Hsien Chen on receiving 2012 Ho Chin-Tui Foundation ... (more)
2012-12-25	Congratulations to Dr. Yu-Ju Lin on receiving 2013 Academia Sinica Career Development Award.
2012-12-25	Congratulations to Dr. Huan-Cheng Chang on receiving 2013 Academia Sinica Investigator Award.
2012-12-04	Welcome new assistant research fellow Dr. Chia-Lung Hsieh.
2012-11-19	Congratulations to Mr. Tzi-Fu (Dr. Ta-Chau Chang group) on receiving the 2012 CHIMEI Scholarship.
2012-07-05	Congratulations to Dr. Kopin Liu for his paper entitled, " Revealing the st ... (more)

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