Abstract In this paper, the glass composition of (50-x)P2O5-xB2O3-30CuO-20Li2O (x = 0, 5, 10, 15, and 20 mol%) was prepared and the effect of P2O5 substitution by B2O3 on their structural, optical, switching, and antibacterial characteristics was studied. FT-IR spectra showed that an increase in the B2O3 content leads to gradual erosion of the phosphate characteristic bonds, and the emergence of borate-related ones by creating new linkages between phosphate chains through P–O–B bonds and formation of highly cross-linked P3-O-B4 linkages. The incorporation of boron up to 20 mol%, also leads to an overall increase in glass transition temperature together with a decrease in the molar volume which both, implied improvement of glass stability. Optical studies revealed that all glasses are almost transparent in the UV–Vis region with high band gap energy about 3.83 eV, which experiences a red-shift with increase in the B2O3 concentration to 15 mol%. By calculating the wavelength-dependent optical parameters, however, it was found that the present glass composition with highest concentration of B2O3 shows refractive index near one and very negligible extinction coefficient (and imaginary optical dielectric function) at the visible region. These results support the great potential of the mentioned glass composition as a window layer. The analysis of the high electric field measurements demonstrated a wide range reduction in switching threshold voltage as the B2O3 content increases. This hints at their potential application as electrical-induced sensors. The antibacterial activity of x = 0 and x = 5 glass compositions has been examined by zone of inhibition measurements and it was found that they have potential applications as antibacterial agent.

中文翻译：

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四元硼磷酸盐多功能玻璃的制备及其结构、光学、开关和抗菌性能

摘要 本文制备了 (50-x)P2O5-xB2O3-30CuO-20Li2O (x = 0、5、10、15 和 20 mol%) 的玻璃成分，并研究了 B2O3 取代 P2O5 对其结构的影响。 、光学、开关和抗菌特性进行了研究。FT-IR 光谱表明，B2O3 含量的增加导致磷酸盐特征键的逐渐侵蚀，并通过在磷酸盐链之间通过 P-O-B 键建立新的连接并形成高度交叉的键，从而出现与硼酸盐相关的键。链接的 P3-O-B4 链接。硼的掺入高达 20 mol%，也会导致玻璃化转变温度的整体升高以及摩尔体积的降低，这两者都意味着玻璃稳定性的提高。光学研究表明，所有玻璃在 UV-Vis 区域几乎都是透明的，具有大约 3.83 eV 的高带隙能量，随着 B2O3 浓度增加到 15 mol%，它会发生红移。然而，通过计算与波长相关的光学参数，发现具有最高浓度 B2O3 的本玻璃组合物显示出接近 1 的折射率，并且在可见光区的消光系数（和假想的光学介电函数）可以忽略不计。这些结果支持上述玻璃组合物作为窗口层的巨大潜力。对高电场测量的分析表明，随着 B2O3 含量的增加，开关阈值电压的降低范围很广。这暗示了它们作为电感应传感器的潜在应用。