Cheong Yuen-Ki, Calvo-Castro Jesus, Ciric Lena, Edirisinghe Mohan, Cloutman-Green Elaine, Illangakoon Upulitha Eranka, Kang Qiang, Mahalingam Suntharavathanan, Matharu Rupy Kaur, Wilson Rory M, Ren Guogang
School of Engineering and Technology, University of Hertfordshire, Hatfield AL10 9AB, UK.
School of Life and Medical Sciences, University of Hertfordshire, Hatfield AL10 9AB, UK.
Nanomaterials (Basel). 2017 Jun 23;7(7):152. doi: 10.3390/nano7070152.
Three antimicrobial nanoparticle types (AMNP0, AMNP1, and AMNP2) produced using the Tesima thermal plasma technology were investigated and their compositions were determined using a combination of analytical methods. Scanning electron micrographs provided the morphology of these particles with observed sizes ranging from 10 to 50 nm, whilst FTIR spectra confirmed the absence of polar bonds and organic impurities, and strong Raman active vibrational bands at ca. 1604 and 1311 cm ascribed to C-C vibrational motions were observed. Carbon signals that resonated at δ 126 ppm in the solid state NMR spectra confirmed that sp² hybridised carbons were present in high concentration in two of the nanoparticle types (AMNP1 and AMNP2). X-ray powder diffraction suggested that AMNP0 contains single phase Tungsten carbide (WC) in a high state of purity and multiple phases of WC/WC were identified in both AMNP1 and AMNP2. Finally, X-ray photoelectron spectral (XPS) analyses revealed and quantified the elemental ratios in these composite formulations.
对采用Tesima热等离子体技术制备的三种抗菌纳米颗粒类型（AMNP0、AMNP1和AMNP2）进行了研究，并结合多种分析方法确定了它们的组成。扫描电子显微镜图像显示了这些颗粒的形态，观察到的尺寸范围为10至50纳米，而傅里叶变换红外光谱证实不存在极性键和有机杂质，并且观察到在约1604和1311厘米⁻¹处归因于C-C振动运动的强拉曼活性振动带。固态核磁共振谱中在δ 126 ppm处共振的碳信号证实，在两种纳米颗粒类型（AMNP1和AMNP2）中sp²杂化碳以高浓度存在。X射线粉末衍射表明，AMNP0含有高纯度的单相碳化钨（WC），并且在AMNP1和AMNP2中均鉴定出WC/WC的多相。最后，X射线光电子能谱（XPS）分析揭示并量化了这些复合配方中的元素比例。
