29-04-2013 | Woosung Kwon; Sungan Do; Jinuk Lee; Sunyong Hwang; Jong Kyu Kim; Shi-Woo Rhee, Chemistry of Materials, 2013

In this work, nitrogen-rich carbon nanodots (CNDs) are prepared by the emulsion-templated carbonization of polyacrylamide. The formation mechanism and chemical structure are investigated by infrared, nuclear magnetic resonance, and X-ray photoelectron spectroscopies. Transmission electron ...

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29-04-2013 | Hung, Tran Nhat; Suh, Young Soo, Sensors, 2013

Two feet motion is estimated for gait analysis. An inertial sensor is attached on each shoe and an inertial navigation algorithm is used to estimate the movement of both feet. To correct inter-shoe position error, a camera is installed on the right shoe and infrared LEDs are installed on the ...

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23-04-2013 | Min‐Suk Jang, Wan‐Ho Kim, Young‐Rae Kang, Sang‐Bin Song, Jae‐Pil Kim, Jin‐Hyeok Kim, International Journal of Applied Ceramic Technology, 2013

Understanding the effect of particle size on the optical properties of phosphor is important to increase packaging efficiency in white light‐emitting diodes (LEDs). We have investigated the effect of particle size (10–20μm, 20–25μm, 25–32μm) on the optical properties of a yellow silicate ...

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22-04-2013 | Lihong Liu, Rong‐Jun Xie, Wanyuan Li, Naoto Hirosaki, Yoshinobu Yamamoto, Xudong Sun, Journal of the American Ceramic Society, 2013

A novel Y3−xSi6N11: xCe3+ yellow phosphor was synthesized using the carbothermal reduction and nitridition method at 1550°C for 16h in this letter. Photoluminescence spectra indicated that the phosphor showed broad excitation spectrum and had strong absorption in range of 350–450nm. It ...

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16-04-2013 | Tie Wang; Xirui Wang; Derek LaMontagne; Zhongwu Wang; Y. Charles Cao, Journal of the American Chemical Society, 2013

This Communication reports that needle-like supercrystalline colloidal particles can be synthesized through anisotropy-driven self-assembly of 1,12-dodecanediamine-functionalized CdSe/CdS core/shell nanorods. The resulting superparticles exhibit both 1D lamellar and 2D hexagonal ...

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15-04-2013 | Dongling Geng, Mengmeng Shang, Yang Zhang, Ziyong Cheng, Jun Lin, European Journal of Inorganic Chemistry, 2013

Abstract Novel phosphors, Ca2YF4PO4:Eu2+,Mn2+, have been prepared by high‐temperature solid‐state reactions. XRD and XPS techniques were used to investigate the purity and composition of the as‐prepared samples. The Ca2YF4PO4:Eu2+,Mn2+ phosphors exhibit broad excitation spectra ranging ...

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15-04-2013 | Y. Y. Ma, F. Xiao, S. Ye, Q. Y. Zhang, Z.H. Jiang, Journal of the American Ceramic Society, 2013

CaSi2O2N2: Eu2+ phosphors with zinc acetate additive as a flux agent have been synthesized successfully by solid‐state process. The structure, morphology, and photoluminescence (PL) properties of the compounds are investigated as a function of zinc acetate dihydrate (Zn(CH3COO)2·2H2O) ...

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12-04-2013 | Georgios Tsiminis, Yue Wang, Alexander L. Kanibolotsky, Anto R. Inigo, Peter J. Skabara, Ifor D. W. Samuel, Graham A ..., Advanced Materials, 2013

An organic semiconductor laser, simply fabricated by UV‐nanoimprint lithography (UV‐NIL), that is pumped with a pulsed InGaN LED is demonstrated. Molecular weight optimization of the polymer gain medium on a nanoimprinted polymer distributed feedback resonator enables the lowest reported ...

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09-04-2013 | Markus Seibald; Tobias Rosenthal; Oliver Oeckler; Christian Maak; Andreas Tücks; Peter J. Schmidt; Detlef Wiechert; ..., Chemistry of Materials, 2013

SrSi2O2N2:Eu2+ is an outstanding yellow emitting phosphor material with practical relevance for application in high power phosphor-converted light-emitting diodes. The triclinic compound exhibits high thermal and chemical stability and quantum efficiency above 90% and can be excited by ...

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08-04-2013 | Materials Chemistry and Physics, 2013

15 May 2013 Publication year: 2013Source:Materials Chemistry and Physics, Volume 139, Issues 2–3 A novel green-emitting phosphor Eu2+-doped Ca15(PO4)2(SiO4)6 with a structure derivative of α′-Ca2SiO4 is synthesized by a conventional solid-state reaction method. The ...

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