Luminescence properties of silicon-cellulose nanocomposite

Abstract

We have characterized the structure and luminescence properties for two-component material composed of nanocrystalline cellulose and nanocrystalline (less to 100 nm) silicon powder. An efficient and stable photoluminescence of nanocomposite, resistant to the influence of gas-phase oxidants, has been found. The obtained material has electret-like properties and demonstrates the possibility of multiple-recharging in an electric field near 5·103 V/cm at temperatures ranging from −70°C to 100°C. The presence of the electric field, as well as ozone or low-temperature plasma treatment, does not change the luminescence spectrum due to quantum size properties of silicon nanoparticles. We believe that these particles may appear in two states: both embedded in a cellulose matrix and in the form of mechanical mixture.

Structure and Properties of Microcrystalline Cellulose "Ceramics-Like" Composites Incorporated with LaVO4:Sm Oxide Compound

“…Besides, mentioned characteristics are similar to those published elsewhere concerning luminescence of various cellulosebased materials [5,[8][9][10].…”

“…The complex structure of the cellulose PL is usually caused by presence of several types of molecular fluorophores [8][9][10]. Up to now there are no direct relations between the luminescence band components and type of MCC molecular constituents or its derivatives (e.g., carbonyl groups), but the role of the molecular radicals located on the surface of cellulose microfibrils had been already emphasized.…”

“…Up to now there are no direct relations between the luminescence band components and type of MCC molecular constituents or its derivatives (e.g., carbonyl groups), but the role of the molecular radicals located on the surface of cellulose microfibrils had been already emphasized. Besides, hydroxyl groups located on the surface promote organic molecules adsorption that results in enhancement of the PL [9,10]. Thus, oxide micro/nanoparticles embedded into cellulose have to change characteristics of the MCC host luminescence.…”

“…At the same time, they are of interest as materials for applications in electronic and opto-electronic devices, e.g. such as solar cells, supercapacitors, lithium-ion batteries, flexible "paper" electronics [5][6][7] and luminescent materials [8][9][10] particularly for their potential applications as chemical and biological sensors or for toxic chemical removing [11][12][13].…”

Production of renewable cellulose nanopaper from culinary banana (Musa ABB) peel and its characterization

“…The PL spectra of CNP showed that the emission intensity strongly reliant on photoactive particles in the polymer matrix. In addition, the existence of abundance of hydrogen bond between cellulose fibres and crystallization of water connected to CNF can also be confirmed by PL emission curve of CNP (Pikulev et al, 2012). The optical property in terms of spectral response of developed CNP was investigated by using UV-vis spectrophotometer.…”