Recent advances in cellulose nanocrystals-based sensors: a review

Abstract

Cellulose nanocrystals (CNCs) continue to pique the interest of researchers for sustainable development. These biopolymeric assemblies are significant because of their outstanding physical and chemical characteristics, inherent renewability, sustainability, and...

Stimuli-Responsive Chiral Cellulose Nanocrystals Based Self-Assemblies for Security Measures to Prevent Counterfeiting: A Review

“…The chiral nematic structure of CNCs creates a photonic bandgap, which enables them to reflect specific wavelengths of light depending on their pitch length. , The selective reflection is highly responsive to variations in the surroundings as a result of alterations in the pitch length. The pitch length of CNCs is subject to modification caused by changes in humidity or specific chemical and physical changes, which makes them well-suited for applications involving sensing and anticounterfeiting. , …”

“…Cellulose, a naturally occurring polymer characterized by its renewable nature and ample availability, possesses remarkable mechanical qualities, distinctive optical properties, and favorable biocompatibility, rendering it a highly appealing medium for the conveyance of intelligent optically active substances. − At the nanoscale, the orderly arrangement of cellulose molecules gives rise to observable coloration. NC can be roughly categorized into cellulose nanocrystals (CNCs) and cellulose nanofibers (CNFs) . Additionally, a developing category is known as bacterial nanocellulose (BNCs). , Various kinds of nanocellulose can be synthesized from waste lignocellulosic biomass and afterward employed to fabricate optically sensitive nanocomposites. , CNCs are being extensively used for these classes’ optical, sensing and anticounterfeiting material due to their stimuli-responsive self-assembly behavior.…”

Harnessing the Flexibility of Lightweight Cellulose Nanofiber Composite Aerogels for Superior Thermal Insulation and Fire Protection

“…The variable nature and advantageous qualities of nanocellulose-based aerogels, which are made from cellulose nanocrystals (CNCs), cellulose nanofibers (CNFs), or bacterial cellulose (BCs), include large surface area, high thermal and chemical stabilities, and customizable porosity structure . They have been employed as renewable parts in thermal insulation, optical performance, sensing, oil/water separation, wound dressing, catalyst support, and sound absorption. − Nevertheless, the flammability of aerogels made from CNF remains a significant limitation that impedes their use in this particular application. To meet strict safety regulations, it is imperative to achieve a substantial enhancement in flame retardancy while maintaining insulating qualities and thermal and mechanical stabilities.…”

Chemically tuned cellulose nanocrystals/single wall carbon nanosheet based electrodes for hybrid supercapacitors

“…4 Furthermore, cellulose exhibits remarkable physical/chemical/thermal properties that make it suitable for various applications in energy, sensors, medical devices, transistors, actuators, electric heaters, electromagnetic interference (EMI) shielding materials, and hybrid applications, particularly in the nanoscale domain. 5–10…”