PDF(Pubmed)
Abstract：
We developed a highly sensitive solid-state sensor for mercury detection by stabilizing red-sub-nanometric fluorescent gold nanoclusters (AuNC, 0.9 ± 0.1 nm diameter) with bovine serum albumin in a matrix composed of cellulose nanofibrils (CNF) (BSA-AuNC/CNF). The main morphological and optical features of the system were investigated via atomic force/transmission electron microscopy and UV-Vis/fluorescence spectroscopy. The hybrid film (off-white and highly transparent) showed strong photoluminescene under UV irradiation. The latter is assigned to the AuNC, which also increase the ductility of the emitting film, which was demonstrated for high sensitivity Hg2+ detection. When used as a sensor system, following AuNC printing on CNF hybrid films, a limit of detection <10 nM was confirmed. What is more, nanocellulose films have a high pore structure and selective separation properties, showcasing a wide range of potential applications in many fields such as water treatment and oil-water separation.
摘要：
我们通过稳定红色亚纳米荧光金纳米簇（AuNC，0.9±0.1nm直径）与牛血清白蛋白在由纤维素纳米原纤维（CNF）（BSA-AuNC/CNF）组成的基质中。通过原子力/透射电子显微镜和紫外-可见/荧光光谱研究了该系统的主要形态和光学特征。杂化膜（灰白色且高度透明）在紫外线照射下显示出强光致发光。后者被分配给AuNC，这也增加了发射膜的延展性，这证明了高灵敏度的Hg2+检测。当用作传感器系统时，在CNF混合薄膜上进行AuNC印刷后，确认检测限<10nM。更重要的是，纳米纤维素薄膜具有较高的孔结构和选择性分离性能,在水处理和油水分离等领域展示了广泛的潜在应用。
