Li5Zn8Ga5Ge9O36: Cr3 , Ti4 : A Long Persistent Phosphor Excited in a Wide Spectral Region from UV to Red Light for Reproducible Imaging through Biological Tissue
Li5Zn8Ga5Ge9O36: Cr3 , Ti4 : A Long Persistent Phosphor Excited in a Wide Spectral Region from UV to Red Light for Reproducible Imaging through Biological Tissue
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Li5Zn8Ga5Ge9O36: Cr3 , Ti4 ：在从紫外光到红光的宽光谱区域中激发的长余辉荧光粉，可通过生物组织进行可重复成像
DOI：
10.1002/asia.201900158
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发表时间：
2019
影响因子：
4.1
通讯作者：
Hu Yihua
中科院分区：
文献类型：
--
作者：
Zhou Xinquan;Ju Guifang;Dai Tiansong;Li Yang;Wu Haoyi;Jin Yahong;Hu Yihua
近红外（NIR）长余辉磷光体（LPP）在过去几年中已成为生物成像应用的潜在解决方案。然而，基于它们对短波长激发的依赖，它们的原位应用存在巨大的挑战。本文报道了一种多光谱激发的近红外LPP，Li 5 Zn 8 Ga 5Ge 9 O36：1.5%Cr3+，0.5%Ti4+，它克服了生物组织和其他复杂系统中功能过程的局限性。该LPP在NIR区域（700-800 nm）中表现出高发光强度和长发射持续时间。 实验证明了这种磷光体对组织成像的适用性。它的持久发光（荧光）可以很容易地穿透约2毫米的猪肉。 更重要的是，这种磷光体可以使用红色LED或激光二极管阵列原位再充电，为生物组织提供更新的NIR光谱，这有利于具有高信噪比的长期生物组织成像应用。本文还报道了系统的调查的性质的能量陷阱和COML机制。
Near‐infrared (NIR) long‐persistent phosphors (LPPs) have emerged as a potential solution for bio‐imaging applications over the past few years. However, there are enormous challenges regarding their in situ application based on their dependence on short‐wavelength excitation. In this paper, we report a multi‐spectral excited NIR LPP, Li5Zn8Ga5Ge9O36: 1.5 % Cr3+, 0.5 % Ti4+, which overcomes the limitations of functional processes in biological tissues and other complex systems. This LPP exhibits a high luminescent intensity and a long emission duration in the NIR region (700–800 nm). The applicability of this phosphor to tissue imaging is demonstrated experimentally. Its persistent luminescence (PersL) can easily penetrate approximately 2 mm of pork flesh. More importantly, this phosphor can be re‐charged in situ using a red LED or laser diode array to provide renewed NIR PersL for biological tissues, which is beneficial for long‐term biological tissue imaging applications with high signal‐to‐noise ratios. Systematic investigations of the nature of energy traps and PersL mechanisms are also reported in this paper.