Carbon Dots versus Nano-Carbon/Organic Hybrids—Divergence between Optical Properties and Photoinduced Antimicrobial Activities-猫眼课题宝

DOI：

10.3390/c8040054

发表时间：

2022-10

期刊：

影响因子：

通讯作者：

中科院分区：

文献类型：

作者：

A. F. Adcock;Ping Wang;Elton Y. Cao;Lin Ge;Yongan Tang;Isaiah S. Ferguson;Fares S. Abu Sweilem;L. Petta;W. Cannon;Liju Yang;C. Bunker;Ya-Ping Sun

碳点(CDot)通常被定义为表面具有有机官能化的小碳纳米颗粒，其经典的合成实际上是对现有的碳纳米颗粒的官能化。然而，除了这些“经典定义的CDot”之外，文献中报道的大多数Dot样品都是通过有机前体的热碳化而制备的，主要是“一锅”工艺。在本工作中，选定的碳化前驱体分别在200℃、330℃、6h的条件下进行热处理，并在微波辐射下加热，分别得到CS200、CS330和CSMT样品。这些样品在结构上不同于经典的CDot，应被视为“纳米碳/有机杂化材料”。它们的光谱性质与经典的CDot相似，但在相关的光诱导抗菌活性方面却有很大的不同。探讨了这种分化的机理，结果表明，与杂种的结构和形态特征有关的主要因素。

Carbon dots (CDots) are generally defined as small-carbon nanoparticles with surface organic functionalization and their classical synthesis is literally the functionalization of preexisting carbon nanoparticles. Other than these “classically defined CDots”, however, the majority of the dot samples reported in the literature were prepared by thermal carbonization of organic precursors in mostly “one-pot” processing. In this work, thermal processing of the selected precursors intended for carbonization was performed with conditions of 200 °C for 3 h, 330 °C for 6 h, and heating by microwave irradiation, yielding samples denoted as CS200, CS330, and CSMT, respectively. These samples are structurally different from the classical CDots and should be considered as “nano-carbon/organic hybrids”. Their optical spectroscopic properties were found comparable to those of the classical CDots, but very different in the related photoinduced antibacterial activities. Mechanistic origins of the divergence were explored, with the results suggesting major factors associated with the structural and morphological characteristics of the hybrids.

Carbon Dots versus Nano-Carbon/Organic Hybrids—Divergence between Optical Properties and Photoinduced Antimicrobial Activities

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