Recently, researchers at the Centre for Nano and Soft Matter Science in Bengaluru have introduced a groundbreaking protocol for confining liquid crystals in a unique architecture known as hierarchical double networks of polymers. This pioneering technique offers advanced solutions for energy-efficient switchable smart windows, revolutionizing the concept of window technology. By seamlessly transitioning between low and high transmittance levels, these windows provide next-generation capabilities for privacy and high spatial resolution.
Harnessing the Power of Hierarchical Double Networks of Polymers:
The utilization of a unique protocol that incorporates hierarchical double networks of polymers enables the confinement of liquid crystals, thereby unlocking the potential for energy-efficient switchable smart windows. This innovative architecture is created using two independently controlled stimuli: light and temperature.
Light-Induced Orientation and Temperature-Driven Organogelation:
In this revolutionary technique, light is utilized to induce an orientationally self-assembled polymer network. This light-induced network serves as the first layer of the hierarchical double networks. Simultaneously, temperature-driven organogelation is employed to create a second network, transforming the system into a semi-solid material composed of gelling molecules in the presence of an appropriate organic solvent. The formation of these two networks effectively traps the liquid crystal within the porous hierarchical structure.
Precise Control for Direction-Dependent State Switching:
The resulting porous hierarchical network allows for precise control over the behavior of the confined liquid crystal. This control enables the liquid crystal to be electrically switched between direction-dependent states. The virtual surfaces created by the polymeric and gel nature of the network govern the dynamics of the confined liquid crystal, providing a highly versatile platform for advanced window technology.
Advantages of the Novel Architecture:
Aside from its intriguing thermodynamic characteristics, this novel architecture holds promise for next-generation low-energy-consuming smart windows. By incorporating the hierarchical double networks of polymers, the switchable smart windows can transition on-demand between high and low transmittance states. This capability not only enhances privacy but also offers high spatial resolution, which can be achieved through lithography techniques.
Energy Efficiency and Sustainability:
The development of these energy-efficient switchable smart windows has far-reaching implications. By seamlessly transitioning between high and low transmittance levels, these windows reduce the need for artificial lighting and air conditioning, thereby reducing energy consumption and lowering carbon footprints. This breakthrough technology aligns with global efforts towards sustainable living and eco-friendly practices.
Applications Beyond Smart Windows:
While the immediate application of hierarchical double networks of polymers is evident in the realm of smart windows, the potential of this innovation extends beyond this domain. The precise control over liquid crystal behavior opens doors to other fields such as sensors, optical devices, and displays. The versatility and adaptability of this technology make it an exciting prospect for future advancements in multiple industries.
