Luminescent nanoparticle-arrays synthesized via polymer pen lithography
Luminescent nanoparticle-arrays synthesized via polymer pen lithography
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通过聚合物笔光刻合成的发光纳米颗粒阵列
DOI：
10.1007/s12274-022-4968-0
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发表时间：
2022-10-11
期刊：
影响因子：
9.9
通讯作者：
Huang，Ling
中科院分区：
文献类型：
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作者：
Wang，Ping;Bao，Shuyi;Huang，Ling
我们报道了一种通过聚合物笔光刻（PPL）产生镧系元素掺杂的上转换纳米颗粒（UCNP）阵列的高通量方法，其中采用两种类型的聚合物代替昂贵的嵌段共聚物，其中一种用作油墨载体，例如，聚乙二醇-400（PEG-400）以促进从尖端到基底的平滑转移，而另一种，例如，聚乙烯吡咯烷酮（PVP）作为螯合剂，以确保金属离子的成功图案化。PVP与稀土离子（RE 3+）的强配位作用是减弱RE 3+与载体PEG-400相互作用的关键，从而使油墨保持良好的流动性。进一步的实验结果表明，除了PVP外，具有能与RE 3+离子配位的功能基团的小分子，如油酸，也可以起到与PVP相同的作用，极大地丰富了PPL的墨水库，可以可靠地产生超过1 cm 2面积的包含单个UCNP的阵列，并具有特征上转换发光。这种策略不仅可以可靠地生产单个UCNP阵列，还为精确合成用于激光，成像，加密和防伪的多功能NP开辟了新的途径。
We report a high-throughput approach to generating lanthanide-doped upconversion nanoparticle (UCNP) arrays through polymer pen lithography (PPL), where instead of the expensive block co-polymer, two types of polymers are employed with one working as ink carrier, e.g., polyethylene glycol-400 (PEG-400) to facilitate smooth transfer from the tip to the substrate and the other, e.g., polyvinyl pyrrolidone (PVP), as chelator to ensure successful patterning of metal ions. The strong coordination of PVP with rare earth ions (RE3+) is the key for weakening the interaction between RE3+ions and the carrier PEG-400 so that the good mobility of ink can be retained. Further experimental results have shown that besides PVP, small molecules with functional groups that can coordinate with RE3+ions, such as oleic acid, can also serve the same role as PVP, which greatly enriches the ink library for PPL. Over 1 cm2area arrays comprising individual UCNP can be reliably generated with characteristic upconversion luminescence. This strategy not only allows reliable production of individual UCNP arrays, it also paves new avenue to the precise synthesis of multifunctional NPs for lasing, imaging, encryption, and anticounterfeiting.