Marrying luminescent Au nanoclusters to TiO₂ for visible-light-driven antibacterial application

Abstract

Long-lasting yet visible-light-driven bacterial inhibition is highly desired for environmental protection and public health maintenance. However, conventional semiconductors such as titanium dioxide (TiO2) are impotent for such antibacterial application due...

Facile carbon–silver nanocomposites based on polysaccharide-derived carbon dots for antibacterial applications

“…Designed hybrid nanocomposites (NCs), on the other hand, have been endowed with the unique components of different nanoparticles, helping the nanomaterials extend their application, 22,23 such as in catalysis, 24,25 sensors, 26 electronics, 27 diagnosis, 28 and therapy. 29 In antibacterial use, hybrid NCs merging different nanomaterials have produced better performance than single-component counterpart, such as AuPt NCs with superior activity, 30 Au–Ag NCs 31 and Ag–Au nanoplates 32 with higher stability, and Bi–Cu NCs 33 and Au–TiO 2 NCs 34 with higher photoresponsive activity. According to the forms of metal-alloy nanoparticles or particle-coated nanoparticles, hybrid NCs are commonly constructed via chemical reduction and covalent binding.…”

Conjugating AIE-featured AuAg nanoclusters with highly luminescent carbon dots for improved visible-light-driven antibacterial activity

“…26,27 Different from traditional metal NC-based antibacterial agents, the one with photodynamic function could perform as a photocatalyst to continuously produce ROS with the assistance of solar light to kill broadspectrum bacteria. [28][29][30] To have excellent photodynamic antibacterial efficacy, metal NC-based photocatalysts should possess good photostability, outstanding harvesting ability for visible light, and superior productivity/separation of sufficient charge carriers. 23,31 It should be mentioned that highly luminescent metal NCs, especially those aggregation-induced emission (AIE)-featured metal NCs with a long-lived photoluminescence (PL) lifetime and high PL quantum yield, are beneficial for the production/separation of sufficient charge carriers, which could ensure the success of photodynamic bacterial killing by avoiding the possible photothermal antibacterial pathway.…”

Origin of luminescence properties and synthetic methods for gold- and bimetallic gold-based nanomaterials

“…75 Besides sensing and imaging applications of gold nanomaterials due to their SPR peak or luminescence properties, they have several applications including real-time observation of the temperature variation in targeted cancer cells, 76 luminescence resonance energy transfer, 77 screening of synthetic cannabinoids 78 and antibacterial applications. 79,80…”

“…75 Besides sensing and imaging applications of gold nanomaterials due to their SPR peak or luminescence properties, they have several applications including real-time observation of the temperature variation in targeted cancer cells, 76 luminescence resonance energy transfer, 77 screening of synthetic cannabinoids 78 and antibacterial applications. 79,80 The atomic-level synthetic approach for the preparation of noble metal NPs and the complexity in their synthetic process have been discussed in recent reviews (Table 2). 34,[81][82][83][84][85][86][87][88][89][90][91][92][93] Simultaneously, the correlation of the atomic-level modification of the surface of nanomaterials with their corresponding catalytic activity is important for understanding the role of metal doping in these NPs.…”