Koroleva Maria S, Tracey Chantal, Sidunets Yuri A, Torlopov Mikhail A, Mikhaylov Vasily I, Krivoshapkin Pavel V, Martakov Ilia S, Krivoshapkina Elena F
Institute of Chemistry of Federal Research Centre "Komi Science Centre of the Ural Branch of the Russian Academy of Sciences" 48 Pervomayskaya Street 167000 Syktyvkar Russia
ITMO University Lomonosova Str., 9 Saint Petersburg 191002 Russian Federation.
RSC Adv. 2020 Sep 21;10(58):35031-35038. doi: 10.1039/d0ra07300h.
Both cellulose nanocrystals and gold nanoparticles show immense potential for biological and chemical applications. Gold nanoparticles, which tend to aggregate, are hybridized with cellulose nanocrystals to form stable inorganic-organic hybrids in which nanocellulose acts as a green supporting material for the catalytically active gold nanoparticles. A green synthesis approach was taken, and hydrothermal treatment was used to reduce electrostatic repulsion between the gold nanoparticles and the cellulose nanocrystals to promote heteroaggregation instead of homoaggregation. AFM analysis showed hybrid films to be hygroscopic, suggesting that they would respond to changes in humidity. Laser diffraction and fluorescence quenching were used to determine how hybrid films respond to changes in humidity. Hybrid films were found to respond to changes in humidity quickly, reversibly, and autonomously, making them ideal for use as or in a humidity sensor. Gold nanoparticles were shown to enhance the hybrid response to ambient moisture, causing them to show a linear dependence on changes in humidity, making the hybrid controllable, highly sensitive, and a viable prospective material for humidity sensing applications.
纤维素纳米晶体和金纳米颗粒在生物和化学应用方面都显示出巨大潜力。易于聚集的金纳米颗粒与纤维素纳米晶体杂交，形成稳定的无机 - 有机杂化物，其中纳米纤维素作为具有催化活性的金纳米颗粒的绿色支撑材料。采用了绿色合成方法，并利用水热处理来减少金纳米颗粒与纤维素纳米晶体之间的静电排斥，以促进异质聚集而非同质聚集。原子力显微镜分析表明杂化膜具有吸湿性，这表明它们会对湿度变化做出响应。使用激光衍射和荧光猝灭来确定杂化膜如何响应湿度变化。发现杂化膜对湿度变化的响应快速、可逆且自主，使其成为用作湿度传感器或用于湿度传感器的理想材料。金纳米颗粒被证明可增强杂化物对环境湿度的响应，使其对湿度变化呈现线性依赖关系，从而使杂化物可控、高度敏感，成为湿度传感应用中一种可行的潜在材料。
