Fungus‐Based Synthesis of Chemically Difficult‐To‐Synthesize Multifunctional Nanoparticles of CuAlO₂

Abstract

Fungal nanosynthesis of ternary CuAlO2 phase is achieved at 50 °C. This phase is chemically difficult to synthesize at low temperatures because of the incompatible oxidation chemistry of Cu and Al. The synthesized protein‐capped water‐dispersible nanoparticles show blue luminescence and radio‐frequency absorption (see figure).

Novel Nanofluid Based on Water-Loaded Delafossite CuAlO2 Nanowires: Structural and Thermal Properties

“…Recent advances in material technology allow the synthesis of innovative heat transfer fluids with enhanced transport and thermal properties by suspending nanoparticles in base fluids [9]. Generally, nanofluids possess some remarkable properties, such as less clogging problem, reduced heat transfer system size, higher thermal conductivity, better stability, and lower pressure [10,11]. In recent years, different scientific endeavors have been carried out in the quest of new nanofluid composites with improved parameters [12].…”

The luminescent properties of CuAlO2

“…12,14,[16][17][18][19]26 In terms of defect emission, only two reports could be found in the literature indicating the presence of defect luminescence, again with signicantly different peak positions being reported. In the spectra reported by Chiu et al an additional emission centred around 428 nm was observed, while Fang et al observed two additional bands at 470 nm and 590 nm ascribed to copper vacancies and interstitial oxygen respectively.…”

“…[7][8][9][10][11] Additionally, more exotic methods such as polymer assisted deposition and fungus assisted synthesis have also been demonstrated. 12,13 Despite this rapid advance, many questions remain, particularly with respect to the intrinsic band gap and optical properties of this material. To date, most optical studies have focused on absorption measurements of thin lms or single crystals.…”

“…To date, studies of the photoluminescence properties of CuAlO 2 have seldom been reported and the reports that are available are limited to room temperature luminescence measurements. 9,12,[14][15][16][17][18][19] At room temperature, thermal effects oen obscure important optical properties, which are essential for a comprehensive understanding of a material's properties. Furthermore, determination of the optical properties of a material via absorption measurements and Tauc plots can introduce signicant error if excitonic effects and surface scattering are important.…”

Extracellular Biosynthesis of Monodispersed Gold Nanoparticles, their Characterization, Cytotoxicity Assay, Biodistribution and Conjugation with the Anticancer Drug Doxorubicin

“…The chemical routes are toxic and require extremes of temperature, while the physical ones are expensive and laborious. Unlike these, biological routes for the synthesis of nanoparticles have recently been developed and yield nanoparticles at room temperature and physiological pH, with properties such as high stability, water dispersal, fluorescence, etc., which are very difficult to achieve by chemical and physical routes [16][17][18][19][20][21][22]. Moreover, biologically synthesized nanoparticles are naturally …”