通过晶种生长实现宏观DNA编程光子晶体
Macroscopic DNA-programmed photonic crystals via seeded growth
AI总结：
本文提出一种稳健的两步法协议，通过微流控液滴组装与晶种扩散限制生长，成功制备包含数百万光学级DNA功能化颗粒的宏观单畴光子晶体，克服了动力学陷阱，为DNA编程光子器件工程化扫除关键障碍。
摘要：
光子晶体——一类其光学性质不仅源于其组成还源于其结构的材料——可以通过自组装尺寸与可见光波长相当的颗粒来制备。原理验证研究表明，DNA可用于引导微米级胶体颗粒自组装成具有可见光谱光子性质的完全可编程晶体结构。然而，微米级DNA功能化颗粒对温度极其敏感的动力学特性，阻碍了生长光子超材料应用所需的大型、单分散晶体的尝试。在此，我们描述了一种稳健的两步法协议，用于自组装包含数百万光学级DNA功能化颗粒的单畴晶体：首先在通过微流控技术制备的单分散液滴中组装单分散晶体，随后通过晶种扩散限制生长将其生长至宏观尺寸。我们通过组装不同的宏观单畴光子晶体证明了该方法的普适性，这些晶体具有依赖于底层晶体结构的超材料性质，如结构色。通过规避光学级DNA包覆胶体结晶固有的基本动力学陷阱，我们消除了利用DNA编程材料工程化光子器件的一个关键障碍。
英文摘要：
Photonic crystals -- a class of materials whose optical properties derive from their structure in addition to their composition -- can be created by self-assembling particles whose sizes are comparable to the wavelengths of visible light. Proof-of-principle studies have shown that DNA can be used to guide the self-assembly of micrometer-sized colloidal particles into fully programmable crystal structures with photonic properties in the visible spectrum. However, the extremely temperature-sensitive kinetics of micrometer-sized DNA-functionalized particles has frustrated attempts to grow large, monodisperse crystals that are required for photonic metamaterial applications. Here we describe a robust two-step protocol for self-assembling single-domain crystals that contain millions of optical-scale DNA-functionalized particles: Monodisperse crystals are initially assembled in monodisperse droplets made by microfluidics, after which they are grown to macroscopic dimensions via seeded diffusion-limited growth. We demonstrate the generality of our approach by assembling different macroscopic single-domain photonic crystals with metamaterial properties, like structural coloration, that depend on the underlying crystal structure. By circumventing the fundamental kinetic traps intrinsic to crystallization of optical-scale DNA-coated colloids, we eliminate a key barrier to engineering photonic devices from DNA-programmed materials.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
