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Tunable photoluminescence properties of selenium nanoparticles: biogenic versus chemogenic synthesis
Nanophotonics ( IF 7.5 ) Pub Date : 2020-07-04 , DOI: 10.1515/nanoph-2020-0239
Elena Piacenza 1, 2 , Alessandro Presentato 2 , Belinda Heyne 3 , Raymond J. Turner 4
Affiliation  

Abstract Various technological and biomedical applications rely on the ability of materials to emit light (photoluminescence [PL]), and, among them, metal nanoparticles (NPs) and semi-conductor Quantum Dots (QDs) represent ideal candidates as sensing probes and imaging tools, portraying better PL features than conventional organic dyes. However, the knowledge of PL behavior of semiconductor NPs – i.e., selenium; SeNPs – is still in its infancy, especially for those synthesized by microorganisms. Considering the essential role played by biogenic SeNPs as antimicrobial, anticancer, and antioxidant agents, or food supplements, their PL properties must be explored to take full advantage of them as eco-friendly and versatile tools. Here, PL features of SeNPs produced by the Se-tolerant Stenotrophomonas maltophilia SeITE02 strain, compared with chemogenic ones, are investigated, highlighting the PL dependency on the NP size. Indeed, PL emission shifted from indigo-blue (emission wavelength λ em 400–450 nm) to green-yellow (λ em 480–570 nm) and orange-red (λ em 580–700 nm) for small (ca. 50 nm) and big (ca. 100 nm) SeNPs respectively, revealing the versatility of an environmental bacterial isolate to synthesize diverse PL probes. Besides, biogenic SeNPs show PL lifetime comparable to those of the most used fluorophores, supporting their potential application as markers for (bio)imaging.

中文翻译:

硒纳米粒子的可调光致发光特性:生物合成与化学合成

摘要 各种技术和生物医学应用依赖于材料的发光能力(光致发光 [PL]),其中,金属纳米粒子 (NPs) 和半导体量子点 (QDs) 是传感探针和成像工具的理想选择。 ,描绘出比传统有机染料更好的 PL 特征。然而,半导体 NPs 的 PL 行为知识——即硒;SeNPs——仍处于起步阶段,特别是对于由微生物合成的那些。考虑到生物 SeNP 作为抗菌剂、抗癌剂和抗氧化剂或食品补充剂所发挥的重要作用,必须探索它们的 PL 特性,以充分利用它们作为环保和多功能工具的优势。在这里,由耐硒嗜麦芽窄食单胞菌 SeITE02 菌株产生的 SeNP 的 PL 特征,与化学生成的相比,进行了研究,突出了 PL 对 NP 大小的依赖性。事实上,PL 发射从靛蓝(发射波长 λ em 400-450 nm)转变为绿-黄色(λ em 480-570 nm)和橙红色(λ em 580-700 nm)对于小(约 50 nm) ) 和大(约 100 nm)SeNP,揭示了环境细菌分离物合成不同 PL 探针的多功能性。此外,生物 SeNP 的 PL 寿命与最常用的荧光团相当,支持它们作为(生物)成像标记的潜在应用。揭示了环境细菌分离物合成多种 PL 探针的多功能性。此外,生物 SeNP 的 PL 寿命与最常用的荧光团相当,支持它们作为(生物)成像标记的潜在应用。揭示了环境细菌分离物合成多种 PL 探针的多功能性。此外,生物 SeNP 的 PL 寿命与最常用的荧光团相当,支持它们作为(生物)成像标记的潜在应用。
更新日期:2020-07-04
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