上转换<a data-cfemail="1d537c73726d7c6f69747e71786e5d5e7c6f7f7273" href="/cdn-cgi/l/email-protection">[受电子邮件保护] </a> <a data-cfemail="b0f4dfc4c3f0fdd5c3df9de3d9ff" href="/cdn-cgi/l/email-protection">[受电子邮件保护] </a><sub>2</sub>夹心式核壳纳米混合体，具有可调节的双模发光，可用于3D防伪条形码,Langmuir

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上转换 [受电子邮件保护] [受电子邮件保护] ₂夹心式核壳纳米混合体，具有可调节的双模发光，可用于3D防伪条形码
Langmuir ( IF 3.7 ) Pub Date : 2019-07-31 00:00:00 , DOI: 10.1021/acs.langmuir.9b01919
Haihu Tan , Guo Gong , Shaowen Xie , Ya Song , Changfan Zhang , Na Li ₁ , Dong Zhang ₂ , Lijian Xu ₁ , Jianxiong Xu ₁ , Jie Zheng ₂

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迫切需要开发先进的荧光材料以构建安全且不可克隆的加密；然而，它们在防伪应用中的应用是一个巨大的挑战。在这项工作中，我们通过将掺杂镧系元素的NaYF ₄上转换纳米粒子（UCNP）和碳点（CD）的两种荧光材料整合到介孔二氧化硅（mSiO）中，提出并合成了一种新型的上转换[受电子邮件保护] [受电子邮件保护] ₂纳米杂化物。₂）从UCNP和CD产生新颖的三明治状核-壳结构和双模荧光。通过量身定制不同上转换发光的UCNP核，所有三种双模发光[email protected] @mSiO ₂纳米杂化物在980 nm激光下表现出典型的RGB上转换发光，在365 nm紫外光下表现出蓝色下转换发光。由于纳米杂化物具有很强的亲水性，因此可以将它们进一步加工成对环境无害的发光墨水，以通过喷墨打印产生高度固定的基于荧光的三维防伪条形码。所得的具有双模和可调发光特性的[电子邮件保护] @mSiO ₂油墨赋予喷墨打印条形码以极高的编码能力和高度的安全性。这种双模荧光墨水和条形码易于制造，易于查看，编码效率高且难以克隆，因此使其成为具有前景的用于防伪应用的纳米材料。

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Upconversion [email protected] [email protected]2 Sandwiched Core–Shell Nanohybrids with Tunable Dual-Mode Luminescence for 3D Anti-Counterfeiting Barcodes

Development of advanced fluorescent materials for constructing a secure and unclonable encryption is urgently required; however, their application in anti-counterfeiting applications is a great challenge. In this work, we proposed and synthesized a new type of upconversion [email protected] [email protected]₂ nanohybrids by integrating two fluorescent materials of lanthanide-doped NaYF₄ upconversion nanoparticles (UCNPs) and carbon dots (CDs) into mesoporous silica (mSiO₂) to produce a novel sandwichlike core–shell structure and a dual-mode fluorescence from UCNPs and CDs. By tailoring the UCNP core of different upconversion luminescence, all three kinds of dual-mode luminescent [email protected]@mSiO₂ nanohybrids exhibited typical RGB upconversion luminescence under a 980 nm laser and blue downconversion luminescence under a 365 nm UV light. Due to strong the hydrophilic nature of the nanohybrids, they can be further fabricated into environmentally benign luminescent inks for creating highly secured, fluorescent-based, three-dimensional anti-counterfeiting barcodes via inkjet printing. The resultant [email protected]@mSiO₂ inks with a dual-mode and tunable luminescence nature endow the inkjet-printing barcodes with an extremely high encoding capacity and high security. Such dual-mode fluorescent inks and barcodes are simple to fabricate, easy to view, efficient for coding, and difficult to clone, thus making them promising nanomaterials for anti-counterfeiting applications.

更新日期：2019-07-31

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