Highly efficient near-infrared photothermal antibacterial membrane with incorporated biogenic CuSe nanoparticles

Artificially regulated synthesis of nanocrystals in live cells

“…The ‘space–time coupling ARLCS strategy’ was first proposed to account for the synthesis of CdSe QDs in S. cerevisiae in 2009 [ 5 , 8 , 26 , 28 , 39 , 40 ], and it has been expanded to the synthesis of various nanocrystals, such as CdTe, ZnSe, CuSe and Te nanorods, in other cell types including Staphylococcus aureus [ 41 – 43 ], Fusarium oxysporum [ 44 ], E. coli [ 45 ], S. oneidensis [ 11 , 15 , 46 ], Bacillus licheniformis [ 47 ], B acillus amyloliquefaciens [ 48 ], Rhodotorula mucilaginosa [ 49 ], Candida utilis [ 50 ], mammalian cells [ 51 ], Tetrahymena pyriformis [ 52 , 53 ], Caenorhabditis elegans [ 54 ] and earthworms [ 38 , 55 ], by easily altering the raw chemicals fed to the cells (Fig. 1 ).…”

“…The crystallization mechanism is that the amorphous precursors are transformed into mesocrystals as intermediates and finally to nanocubes, suggesting that a non-classical crystallization occurred during the formation of the PbSe nanocubes [ 64 ]. Using the similar reduction pathways of TeO 3 2− , Te nanorods with uniform and tunable lengths (ranging from 10 to 200 nm) can be synthesized as we expected [ 46 ]. The molar extinction coefficients are 1.54 × 10 9 (absorption at 549 nm) and 8.06 × 10 8 M −1 cm −1 (absorption at 410 nm) for Te nanorods, respectively, which is comparable to gold nanorods with similar lengths, indicating that Te nanorods may serve as potential photothermal materials in tumor therapy [ 46 ].…”

“…Using the similar reduction pathways of TeO 3 2− , Te nanorods with uniform and tunable lengths (ranging from 10 to 200 nm) can be synthesized as we expected [ 46 ]. The molar extinction coefficients are 1.54 × 10 9 (absorption at 549 nm) and 8.06 × 10 8 M −1 cm −1 (absorption at 410 nm) for Te nanorods, respectively, which is comparable to gold nanorods with similar lengths, indicating that Te nanorods may serve as potential photothermal materials in tumor therapy [ 46 ].…”

A biodegradable and near-infrared light-activatable photothermal nanoconvertor for bacterial inactivation

“…These physical stimulation based nano-antibacterial strategies often have the advantages of spatio-temporally controllable and highly efficient treatment. 25–28 In particular, the photothermal antibacterial method based on near-infrared (NIR) light, which has the characteristics of easy access to the light source, strong tissue penetration ability, and rapid sterilization (killing bacteria in a few minutes), 29–36 has attracted extensive attention and made great progress in recent years. For example, Gao and coworkers reported a nanovehicle based on a facile assembly between α-cyclodextrin-modified molybdenum sulfide (MoS 2 ) nanosheets and a heat-sensitive NO donor N , N ′-di- sec -butyl- N , N ′-dinitroso-1,4-phenylenediamine (BNN 6 ), and this novel and biocompatible nanovehicle can achieve a rapid and low-cost inhibition for Gram-negative and Gram-positive bacteria efficiently.…”

Designing highly stable ferrous selenide-black phosphorus nanosheets heteronanostructure via P-Se bond for MRI-guided photothermal therapy

“…Organic nanomaterials such as indocyanine green (ICG) [ 9 ], conjugated polymers [ 10 ] and dopamine melanin [ 11 ], have high biocompatibility and low toxicity, but poor photobleaching and thermal stability hinder their application in biomedicine. In contrast, inorganic nanomaterials such as graphene oxide [ 12 ], precious metal nanomaterials [ 13 ], transition metal carbides [ 14 ] and carbonitrides [ 15 , 16 ] have been widely researched due to their easy modification, adjustable morphology and high physiological stability [ 17 , 18 ]. However, the safety and biocompatibility of inorganic nanomaterials are still great challenges.…”