Aminzare Masoud, Li Yangshixing, Mahshid Sara, Dorval Courchesne Noémie-Manuelle
Department of Chemical Engineering, McGill University, Montreal, Canada.
Department of Bioengineering, McGill University, Montreal, Canada.
Sci Rep. 2024 Jul 4;14(1):15357. doi: 10.1038/s41598-024-66116-8.
Halide perovskite (HPs) nanostructures have recently gained extensive worldwide attentions because of their remarkable optoelectronic properties and fast developments. However, intrinsic instability against environmental factors-i.e., temperature, humidity, illumination, and oxygen-restricted their real-life applications. HPs are typically synthesized as colloids by employing organic solvents and ligands. Consequently, the precise control and tuning of complex 3D perovskite morphologies are challenging and have hardly been achieved by conventional fabrication methods. Here, we combine the benefits of self-assembly of biomolecules and an ion exchange reaction (IER) approach to customize HPs spatial shapes and composition. Initially, we apply a biomineralization approach, using biological templates (such as biopolymers, proteins, or protein assemblies), modulating the morphology of MCO (M = Ca, Ba) nano/microstructures. We then show that the morphology of the materials can be maintained throughout an IER process to form surface HPs with a wide variety of morphologies. The fabricated core-shell structures of metal carbonates and HPs introduce nano/microcomposites that can be sculpted into a wide diversity of 3D architectures suitable for various potential applications such as sensors, detectors, catalysis, etc. As a prototype, we fabricate disposable humidity sensors with an 11-95% detection range by casting the formed bio-templated nano/micro-composites on paper substrate.
卤化物钙钛矿（HPs）纳米结构因其卓越的光电性能和快速发展，近年来在全球范围内受到广泛关注。然而，其对环境因素（即温度、湿度、光照和氧气）的固有不稳定性限制了它们的实际应用。HPs通常通过使用有机溶剂和配体作为胶体进行合成。因此，精确控制和调节复杂的三维钙钛矿形态具有挑战性，传统制造方法很难实现这一点。在这里，我们结合生物分子自组装和离子交换反应（IER）方法的优点，来定制HPs的空间形状和组成。首先，我们应用生物矿化方法，使用生物模板（如生物聚合物、蛋白质或蛋白质组装体），调节MCO（M = Ca、Ba）纳米/微结构的形态。然后我们表明，材料的形态可以在整个IER过程中保持，以形成具有多种形态的表面HPs。所制备的金属碳酸盐和HPs的核壳结构引入了纳米/微复合材料，这些复合材料可以被雕刻成各种各样的三维结构，适用于各种潜在应用，如传感器、探测器、催化等。作为一个原型，我们通过将形成的生物模板化纳米/微复合材料浇铸在纸质基板上，制造出了检测范围为11 - 95%的一次性湿度传感器。
