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首页> 外文期刊>Nanotechnology >Detection of TNT using a sensitive two-photon organic dendrimer for remote sensing
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Detection of TNT using a sensitive two-photon organic dendrimer for remote sensing

机译：使用敏感的双光子有机树状大分子进行遥感检测TNT

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摘要

There is currently a need for superior stand-off detection schemes for protection against explosive weapons of mass destruction. Fluorescence detection at small distances from the target has proven to be attractive. A novel unexplored route in fluorescence chemical sensing that utilizes the exceptional spectroscopic capabilities of nonlinear optical methods is two-photon excited fluorescence. This approach utilizes infra-red light for excitation of remote sensors. Infra-red light suffers less scattering in porous materials which is beneficial for vapor sensing and has greater depth of penetration through the atmosphere, and there are fewer concerns regarding eye safety in remote detection schemes. We demonstrate this method using a novel dendritic system which possesses both excellent fluorescence sensitivity to the presence of TNT with infra-red pulses of light and high two-photon absorption (TPA) response. This illustrates the use of TPA for potential stand-off detection of energetic materials in the infra-red spectral regions in a highly two-photon responsive dendrimer.
机译：当前需要用于防止大规模毁灭性爆炸性武器的卓越的防区外探测方案。事实证明，在距目标较小距离处进行荧光检测很有吸引力。利用非线性光学方法的出色光谱功能的荧光化学传感中一种新的未探索途径是双光子激发荧光。这种方法利用红外光激发远程传感器。红外光在多孔材料中的散射较少，这有利于蒸气感测，并具有更大的穿透大气深度，并且在远程检测方案中对眼睛安全性的关注较少。我们展示了一种使用新型树突系统的方法，该系统既具有对TNT的存在的出色荧光敏感性，又具有红外脉冲光和高双光子吸收（TPA）响应。这说明了TPA在高双光子响应性树枝状大分子的红外光谱区域中潜在的高能物质检测中的应用。

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