02184nas a2200169   4500008004100000245010500041210006900146260000800215300001400223490000700237520156800244100001601812700002601828700001701854700001701871856012601888       2017                        eng d00aSize reduction of bulk alumina for mass production of fluorescent nanoalumina by fungus humicola sp.0 aSize reduction of bulk alumina for mass production of fluorescen  cJUL  a1981-19930 v283 aIn recent years, nanomaterials have made their way into hundreds of biomedical, life-sciences and technological applications. One such nanomaterial of extreme importance is nanoalumina (Al2O3 nanoparticles). This nanomaterial is an epitome of diversity with applications exhibited in the fields of catalysis, cosmetics, theranostics, energy generation, biosensors, drug-delivery, tumor-regression, etc. However, problems persist in terms of biocompatibility, cost-effectiveness, reproducibility and mass-production of nanoalumina by the presently existent physical, chemical and biological methodologies. Herein, we for the first time are presenting a top-down biofabrication method by which size reduction of commercial bulk alumina/aluminum oxide (5 A mu m) into nanoalumina (5-25 nm) is carried out by a thermophilic fungus Humicola sp. within 96 h of reaction at just 50 A degrees C. The so-formed nanoalumina is highly stable, water dispersible, fluorescent and natural protein capped; characterization engaged standard techniques. These nanoparticles exhibit anti-bacterial properties against Gram-positive Bacillus subtilis strain and may serve as broad spectrum bactericidal agents. We believe that our novel top-down approach may be extensively used in the facile, inexpensive, eco-friendly and reliable fabrication of abundant quantities of nanomaterials of different chemical compositions, sizes and shapes with better control and predictability over the properties as derived from their substrates. The mechanistic aspect of said protocol is underway.1 aMoeez, Sana1 aSiddiqui, Ejaz, Ahmad1 aKhan, Shadab1 aAhmad, Absar  uhttps://library.ncl.res.in/content/size-reduction-bulk-alumina-mass-production-fluorescent-nanoalumina-fungus-humicola-sp