Abstract
BiOBr nanosheets are important photocatalytic nanomaterials. However, their biological effects remain to be explored. In this study, we investigated the antifungal effect of BiOBr nanosheets on Candida albicans. Strikingly, the nanosheets strongly inhibited the growth of C. albicans [IC50=(96±4.7) mg/L], hyphal development and biofilm formation. Compareed to the antifungal effect of the cationic surfactant cetyltrimethylammonium bromide, the inhibitory effect of the nanosheets on fungal pathogen was attributed to cetyltrimethylammonium bromide adsorbed by the nanosheets. Thermal gravity analysis and cetyltrimethylammonium bromide release experiment indicated that only 0.42% cetyltrimethylammonium bromide on BiOBr nanosheets was released. Taken together, this study uncovers the contribution of surfactant released from the nanosheets to their antifungal activity.
Highlights
Nanomaterials have shown great promise in fields such as photocatalysis[1–2], photothermal therapy[3–4], biosensor[5–6], diagnosis and imaging[7–9]
Evidence has showed that some kinds of nanomaterials have antifungal property
We first tested the effect of BiOBr nanosheets on C. albicans growth
Summary
Nanomaterials have shown great promise in fields such as photocatalysis[1–2], photothermal therapy[3–4], biosensor[5–6], diagnosis and imaging[7–9]. Nanomaterials have attracted much attention in the research of anticancer drug carriers, photothermal therapy for cancer cells, etc., because of their intrinsic optical properties, including resonance Raman scatter-. Ing, near-infrared (NIR) pho-toluminescence, and NIR optical absorption[10]. BiOBr nanomaterials have high light-harvesting capacities under visible light irradiation. BiOBr can remove water pollutants, such as dye[11–12], microcystin[13], bisphenol[14–15] and acetophenone[16]. Photocatalysis has already emerged as an advanced oxidation technology in water disinfection process[5]. The intensity of light decreases exponentially with water
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