MAOA and the neurogenetic architecture of human aggression

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• 作者：Joshua W. Buckholtz ; Andreas Meyer-Lindenberg
• 关键词：Ultraviolet luminescence ; Gadolinium-doped yttrium oxide ; Sub-micron particles
• 刊名：Trends in Neurosciences
• 出版年：2008
• 期刊代码：260_01662236
• 类别：med
• 出版时间：March 2008
• 卷：31
• 期：3
• 页码：120-129
• 文件大小：975 K

摘要

Gadolonium-doped yttrium oxide (Y₂O₃:Gd) was synthesized by simple heating of precursors in a polymer solution. This material is potentially useful as an ultraviolet source, since ultraviolet light is emitted when electron transition between energy states in Gd ions occurs. The grain sizes of the particles were found to be sub-micron down to several tens of nanometers. Optimum conditions for producing highly crystalline material with small grain and crystal sizes was investigated by varying the parameters for the synthesis, such as heating temperature, heating time, and dopant concentration. A heating temperature at 800 °C and a heating time of 30 min was optimum, i.e., appreciably high crystallinity and small grain sizes were produced. The particles produce ultraviolet light, peaking at 315 nm, and the intensity of the light depends on the dopant concentration. The maximum intensity was achieved at a dopant concentration of 5 to 10% at./at.