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Terahertz spectroscopy characterization of antibacterial surfaces prepared via multistep physicochemical procedure

机译：通过多步理化程序制备的抗菌表面的太赫兹光谱表征

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摘要

The antibacterial surfaces presented can be one of the solutions for lowering the risk of pathogen outbreaks. Samples were prepared via a multistep physicochemical approach and characterized by terahertz spectroscopy. Properties of modified materials were analyzed using two spectrometers-terahertz pulsed imaging and spectroscopy Spectra [attenuated total reflection (ATR) and transmission module] and Tera optical sampling by cavity tuning. Each sample was measured 3 to 10 times to get accurate results. Observed regions for the transmittance module were set to 0 to 2.6 THz, and 0 to 4 THz for the ATR module. The obtained refractive indices allowed for easy distinguishing between each material. Absorbance spectra were assigned where possible as was the peak position that showed successful bonding of the used monomers/antibacterial agents. Measured dielectric properties described slight changes in materials due to the modification process. The experimentally analyzed transmittance displayed changes in every material up to the 2.6 THz region and Fabry-Perot interferences together with water vapor noise beyond this area. The section containing terahertz imaging of the samples is presented. The present work is one of the first of its kind. The possibility of using terahertz spectroscopy for characterizing materials with antibacterial agents bonded by intermolecular forces onto a treated surface is presented.
机译：所提供的抗菌表面可以是降低病原体暴发风险的解决方案之一。通过多步物理化学方法制备样品，并通过太赫兹光​​谱表征。使用两个光谱仪分析了改性材料的性能-太赫兹脉冲成像和光谱法[衰减全反射（ATR）和透射模块]和Tera光学采样，通过腔调谐。对每个样品进行3至10次测量以获得准确的结果。透射率模块的观察区域设置为0到2.6 THz，ATR模块的观察区域设置为0到4 THz。所获得的折射率允许容易地区分每种材料。尽可能分配吸收光谱，以及表明成功结合使用的单体/抗菌剂的峰位置。测得的介电性能描述了由于改性过程材料的轻微变化。经过实验分析的透射率显示了每种材料的变化，直至2.6 THz区域，法布里-珀罗干涉以及该区域以外的水蒸气噪声。介绍了包含太赫兹成像样本的部分。目前的工作是同类工作中的第一批。提出了使用太赫兹光谱来表征具有通过分子间力键合到处理表面上的抗菌剂的材料的可能性。

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