SnS Nanosheets for Rapid and Effective Bacteria Sterilization Under Near‐infrared Irradiation

Abstract

Today, the threat of pathogenic bacterial infection worldwide that leads to the increase of mortality rate strongly demands the development of new antibacterial agents that can kill bacteria quickly and effectively. Although there are a lot of antibacterial agents that have been developed so far, few studies on the antibacterial performance of SnS have been investigated at 808 nm laser. Here, we synthesized SnS nanosheets with strong near-infrared absorption performance and excellent antibacterial performance via a simple solvothermal synthesis route. The as-prepared SnS nanosheets showed excellent photothermal conversion efficiency (38.7 %), photodynamic performance, and photostability, and at the same time 99.98 % and 99.7 % sterilization effect against Gram-negative Escherichia coli (E. coli) and Grampositive Bacillus subtilis (B. subtilis) under near-infrared irradiation (808 nm, 1.5 W/cm 2 ). This study suggests that SnS nanosheets could be a promising candidate for antibacterial therapy owing to the synergetic effects of photothermal and photodynamic performance.

Efficient and selective removal of ReO4− from highly acid solutions by SnS nanoflowers: implications for TcO4− sequestration

“…4c). 29,30 The elemental analysis data obtained via SEM-EDS indicate that the SSF only contains Sn and S (Fig. 4d), and the atomic percentages are very close to 1 : 1, the STEM images can also correspond to this (Fig.…”

“…The SnS was synthesized following a method similar to a previously reported procedure. 29 The SnS was produced in the form of nanoflowers (denoted as SSF) and nanosheets (denoted as SSS), where the latter served as a control sample. The typical procedure is as follows.…”

Review of Metal Sulfide-Based MXene Nanocomposites for Environmental Applications, Gas Sensing, Energy Storage, and Photothermal Therapy

“…MS NPs such as CuS, FeS, Ag 2 S, MoS 2 , WS 2 , and Bi 2 S 3 have been studied for their high antibacterial activity, high PT conversion efficiency, low cost, outstanding stability, strong biocompatibility in vivo, and ease of availability. The exposure of MS NPs to NIR light produces a synergistic photodynamic and PT effect with a strong antibacterial impact. , Alteration of the surface conditions can be used to generate MSs composed of 2D MXene-based materials with ease and potentially enhance the specific surface area to provide benefits for the attachment of MS NPs . Several investigators have been attempting to design new MS NPs with effective antibacterial activity through such techniques.…”

Cell membrane biomimetic nanomedicines for cancer phototherapy

“…Another photothermal mechanism is the generation and relaxation of electron‐hole pairs generally represented by semiconductor materials (e.g., SnS, 44 TiO 2 , 45 and Co 3 O 4 46 ) with intrinsic absorption band gaps. As shown in Figure 1B, when the semiconductor materials are excited by incident light energy higher than their band gap energy, electrons in the valence band (VB) absorb the photon energy and then transition to the conduction band (CB), leaving holes in the VB and forming electron‐hole pairs.…”

“…35b,38 It is worth noting that some metal oxide and metal sulfide nanomaterials, such as MoO 3-x , 39 In 2 O 3 , 40 W 18 O 49 , 41 CuS, 42 and MoS 2 43 also exhibit LSPR photothermal conversion mechanism. Another photothermal mechanism is the generation and relaxation of electron-hole pairs generally represented by semiconductor materials (e.g., SnS, 44 TiO 2 , 45 and Co 3 O 4…”