Recent Progress of Noncovalent Interaction‐Driven Self‐Assembly of Photonic Organic Micro‐/Nanostructures

Abstract

Modern organic photonics is heavily reliant on micro‐/nanostructured organic crystalline materials, not least because they exhibit advantageous physicochemical properties and can be easily fabricated by bottom‐up approaches such as self‐assembly driven by weak noncovalent intermolecular interactions (van der Waals forces, π–π interactions, hydrogen bonds, halogen bonds, charge transfer interactions, etc.). Herein, the effects of these interactions on organic crystal nucleation are summarized, the resulting low‐dimensional organic crystal structures and their optoelectronic applications are discussed, and future development prospects are presented to inspire the further investigation of such optofunctional structures.

Photoluminescent organic crystals and co-crystals

“…Since then, even more complex heterostructures morphologies such as core–shell, triblock, dumbbells, and branched ribbons have been reported. 173 Nearly a decade later, the focus shifted to the development of organic heterostructures (OHS), and due to their advantages such as broad spectral tuneability, ease of structural tailoring, ability to self-assemble through bottom-up approach, ultra-fast non-linear response, mechanical flexibility, solution processability and high optical cross sections, OHS are being vigorously explored for use in high-speed optical communication and data processing, optical logic gates, waveguides, organic photonic circuits, wavelength converters, photonic transistors, optical routers, etc. 174 Currently, numerous synthetic routes and mechanisms have been reported for the development of OHS multi-component systems broadly based on solution processing, vapour transport and solvent–vapour processing, as recently reviewed by X.-D. Wang.…”

Tannic Acid-Induced Gelation of Aqueous Suspensions of Cellulose Nanocrystals

“…Rheological behaviors of SH-CNC/TA hydrogels were analyzed using a rheometer Rotational Rheometer MARS III Haake (Thermo Scientific, Bremen, Germany) equipped with a parallel plate geometry (35 mm in diameter) and a 1 mm gap. Oscillatory frequency sweeps (strain = 1%) was conducted from 0.01 to 10 Hz at 25 • C. The complex modulus (G*) and complex viscosity (η*) were calculated by Equations ( 1) and (2).…”

“…Self-assembly driven by noncovalent interactions, including hydrogen bonds, ionic bonds, hydrophobic, and van der Waals interactions, provides a powerful strategy to construct functional materials for a variety of applications ranging from biotechnology to photonics [1,2]. Nanoscale materials have been widely used as essential building blocks for self-assembled materials due to their exceptional mechanical, electrical, and optical properties.…”