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用 Z 扫描法研究表面功能化纳米金刚石的光限幅性能。

Optical limiting properties of surface functionalized nanodiamonds probed by the Z-scan method.

机构信息

Laboratory for Radiation Interaction with Matter, French-German Research Insitute of Saint-Louis, 5 rue du Général Cassagnou, 68301, Saint-Louis, France.

NS3E "Nanomatériaux pour Systèmes Sous Sollicitations Extrêmes" UMR 3208 ISL/CNRS/UNISTRA, French-German Research Insitute of Saint-Louis, 5 rue du Général Cassagnou, 68301, Saint-Louis, France.

出版信息

Sci Rep. 2019 Jan 24;9(1):519. doi: 10.1038/s41598-018-36838-7.

DOI:10.1038/s41598-018-36838-7
PMID:30679574
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6345928/
Abstract

This work focuses on the optical limiting behavior of surface modified nanodiamonds (DNDs) namely, amino-terminated DNDs (DND-NH2) and hydrogen-terminated DNDs (DND-H). Their relevant nonlinear optical properties for optical limiting are compared to those of unfunctionalized DNDs. The optical limitation is characterized by means of nonlinear transmittance, Z-scan, and scattered intensity assessments when submitted to a nanosecond pulsed Nd:YAG laser operating at a wavelength of 532 nm. It is stated that the largest nonlinear attenuation is attributed to the DND-H system, whereas the exceedingly low threshold values for optical limiting for the DND-H and the DND-NH2 systems is attributed to their negative electron affinity character (NEA). Using Z-scan experiments, it is shown that nonlinear refraction combined with a significant nonlinear absorption predominates in the DND-H suspension, while the pure thermal origin of the nonlinear refractive index change is conjectured in the case of the DNDs. Besides, an amazing valley to peak profile was measured on DND - NH2indicating an unexpected positive sign of the nonlinear refraction coefficient. In addition, a stronger backscattered intensity signal is highlighted for the unfunctionalized DNDs through nonlinear scattering measurements.

摘要

这项工作专注于表面修饰纳米金刚石(DND)的光限制行为,即氨基封端的 DND(DND-NH2)和氢封端的 DND(DND-H)。将它们的相关非线性光学性质与未功能化的 DND 进行比较,以用于光限制。通过非线性透射率、Z 扫描和散射强度评估来表征光限制,当用波长为 532nm 的纳秒脉冲 Nd:YAG 激光照射时。据指出,最大的非线性衰减归因于 DND-H 体系,而 DND-H 和 DND-NH2 体系的光限制极低的阈值归因于它们的负电子亲和势特性(NEA)。通过 Z 扫描实验表明,在 DND-H 悬浮液中,非线性折射与显著的非线性吸收相结合占主导地位,而在 DND 情况下,推测出非线性折射指数变化的纯热起源。此外,在 DND-NH2 上测量到令人惊讶的谷峰轮廓,表明非线性折射系数出现意外的正号。此外,通过非线性散射测量,强调了未功能化的 DND 具有更强的反向散射强度信号。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1317/6345928/3e51b7ed2819/41598_2018_36838_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1317/6345928/a52df9230d8d/41598_2018_36838_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1317/6345928/7561a1046177/41598_2018_36838_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1317/6345928/7d768a65af32/41598_2018_36838_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1317/6345928/5c0992873f0f/41598_2018_36838_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1317/6345928/92b8dd40ee96/41598_2018_36838_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1317/6345928/b254678f1090/41598_2018_36838_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1317/6345928/1735e43f4c2b/41598_2018_36838_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1317/6345928/8f21b0b69a9b/41598_2018_36838_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1317/6345928/3e51b7ed2819/41598_2018_36838_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1317/6345928/a52df9230d8d/41598_2018_36838_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1317/6345928/7561a1046177/41598_2018_36838_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1317/6345928/7d768a65af32/41598_2018_36838_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1317/6345928/5c0992873f0f/41598_2018_36838_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1317/6345928/92b8dd40ee96/41598_2018_36838_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1317/6345928/b254678f1090/41598_2018_36838_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1317/6345928/1735e43f4c2b/41598_2018_36838_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1317/6345928/8f21b0b69a9b/41598_2018_36838_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1317/6345928/3e51b7ed2819/41598_2018_36838_Fig9_HTML.jpg

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本文引用的文献

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Characterization of Nanodiamond-based anti-HIV drug Delivery to the Brain.基于纳米金刚石的抗 HIV 药物向大脑递药的特性研究。
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Nonlinear optical spectrum of diamond at femtosecond regime.飞秒 regime 下金刚石的非线性光谱。 (注:这里“regime”结合语境推测可能是“状态、 regime”等意思,不太明确准确意思所以翻译得比较模糊,如果有更准确的解释可以进一步完善翻译)
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Optical properties of functionalized nanodiamonds.功能化纳米金刚石的光学性质
Sci Rep. 2017 Oct 26;7(1):14086. doi: 10.1038/s41598-017-14553-z.
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Functionalized Nanodiamonds for Biological and Medical Applications.用于生物和医学应用的功能化纳米金刚石
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