Light-emitting diodes enhanced by localized surface plasmon resonance

Light-emitting diodes [LEDs] are of particular interest recently as their performance is approaching fluorescent/incandescent tubes. Moreover, their energy-saving property is attracting many researchers because of the huge energy crisis we are facing. Among all methods intending to enhance the efficiency and intensity of a conventional LED, localized surface plasmon resonance is a promising way. The mechanism is based on the energy coupling effect between the emitted photons from the semiconductor and metallic nanoparticles fabricated by nanotechnology. In this review, we describe the mechanism of this coupling effect and summarize the common fabrication techniques. The prospect, including the potential to replace fluorescent/incandescent lighting devices as well as applications to flat panel displays and optoelectronics, and future challenges with regard to the design of metallic nanostructures and fabrication techniques are discussed.     

Photostability of Isovaline and its Precursor 5-Ethyl-5- methylhydantoin Exposed to Simulated Space Radiations

Aqueous solutions of isovaline and its precursor molecule, 5-ethyl-5-methylhydantoin, were irradiated with ultraviolet and γ-ray photons, to evaluate their structural stability against space radiation. The degree of photolysis was measured and irradiation products were identified using chiral, reversed-phase and ion-exchange high-performance liquid chromatography. The experimental results show that the degree of photolysis of 5-ethyl-5-methylhydantoin is more significant than that of isovaline under ultraviolet light irradiation, while the results under γ-ray irradiation are the opposite. As the products of isovaline photolysis, aspartic acid, serine, glutamic acid and alanine were dominantly detected.     

浅谈高速公路沥青混凝土路面下面层配合比设计

通过对广西第一条沥青路面山岭重丘区高速公路--百色至罗村口高速公路下面层配合比设计,对热拌沥青混凝土DAC-20下面层的配合比设计的应用情况,结合施工实际与试验检测项目进行了介绍与总结.     

FLASH小游戏佳作推荐

这是一款非常耐玩也极具挑战性的游戏。你要扮成忍小英雄．秘密潜入一个神秘古堡。古堡有很多层，你只有完成上一层的任务．才能打开进入下一层的隐藏门。古堡内充满了各种陷阱和机关．你必须万分小心，找找机关所在，充分开动脑筋，取走所有宝物！游戏里各层的机关不尽相同，难度也越来越大。     

开心游戏之FLASH开枪就打

我们在2003年第5期中刊登了《开心游戏之Flash射击篇》，读朋友们反响强烈，觉得数量还不够，还不够过瘾，于是，为让大家在家玩得开心，本期再次推出几款刺激好玩的枪战游戏。     

灌溉渠道正常水深显式公式

正常水深是灌溉渠道设计中的一重要参数，均匀流基本公式属于正常水深的隐式公式，不可能由公式直接求解，常藉冗繁费时的试算法方能得出答案，另外列表法和图解法虽亦能得出答案，但前者易出现双重的内插误差，后者出现读图时的判断误差。     

Reconciling trajectory ensemble receptor model results with emissions

Several approaches have been developed that use ensembles of air parcel back trajectories to identify likely source regions for contaminants observed at a downwind receptor site. Although the results of these models have appeared to provide results that agree with known sources, there have not been efforts to make direct comparisons between the results of such analyses with emissions inventories. In this paper, the results of residence time analysis (RTA) of data from Underhill, VT and from Brigantine, NJ are compared to the average estimated emissions of coal- and oil-fired power plants. Excellent correspondence was found between the areas of highest probability identified in the trajectory ensemble analyses and the averaged emission intensities.