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zhulty铁杆木虫 (职业作家)
竹林听雨
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英语文献翻译
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While the examples so far all involve LSPR-based sensing of molecules, other changes can also be detected via LSPR techniques. Recently, the structural changes of a nanoparticle, typically associated with aging and minimization of its surface energy, have been used to develop a novel class of colorimetric indicators for time and the average temperature over extended time frames.For example, the sharp corners of triangular Ag nanoplates in solution will round and become truncated over time, resulting in a large shift in the LSPR. This rounding process was found to be sensitive to temperature. At higher temperatures, the rounding process proceeded faster. These variables (time and temperature) could be calibrated to the LSPR shift of the Ag nanoplates. The color change that accompanies this rounding can be seen with the naked eye, making this new system well suited as time and temperature indicators. When placed on the outside of a product’s packing, the time and temperature information about the product can be easily determined. |
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至尊木虫 (著名写手)
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zhulty: 金币+15, 翻译EPI+1 2012-04-04 11:26:33
zhulty: 金币+15, 翻译EPI+1 2012-04-04 11:26:33
| 尽管目前所有的例子都是关于基于LSPR技术的分子感应的,但利用该技术也能检测其它的变化。最近纳米粒子的结构变化,较为典型的是与老化及表面能态变小相关的,已经被用来开发出新型色标作为时间和某段时间内平均温度的指示。例如,溶液中三角形银纳米板的尖角,长时间将会倒圆并且表面会剥蚀,造成在LSPR上的较大偏移 。 发现该倒圆过程对温度敏感 , 温度越高则倒圆过程进行的越快,这些变化(时间和温度)可以标定到银纳米板的LSPR偏移上。用裸眼即可观察到伴随着倒圆过程的颜色变化 ,使之非常适合用作时间和温度的指示。当其放到产品的外包装上时,关于产品的时间和温度信息就很容易确定了。 |

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