Convenient detection of H2S based on the photothermal effect of Au@Ag nanocubes using a handheld thermometer as readout

Tao, Yingzhou; Lin, Yow-Jian; Luo, Fang; Chen, Fu; Lin, Cuiying; He, Yu; Cai, Zongwei; Qiu, Bin; Lin, Zhenyu

doi:10.1016/j.aca.2021.338211

Cited by 19 publications

(6 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is well-accepted that Au and Ag are two typical plasmonic metals that display unique resonant responses of their free electrons to the electric field of visible and near-infrared light . Such physiochemical properties make them ideal candidates as photothermal materials that efficiently absorb incident light for further conversion. − Meanwhile, the chemical stability of Ag can be enhanced by alloying with Au, which benefits their practical applications …”

Section: Introductionmentioning

confidence: 99%

Size-Tunable Yolk–Shell Gold–Silver Nanostructures for Photothermal Treatment of Multidrug-Resistant Bacteria

Zhang

Tan

Yang

et al. 2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Framelike nanostructures consisting of interconnected, ultrathin ridges have attracted wide attention due to their high atomic utilization efficiency among typical hollow architectures but are yet to be comprehensively studied for photothermal applications. Herein, we report a facile synthesis of AuAg yolk–shell cubic nanoframes (YSCNFs) with tunable edge lengths, followed by the exploration of their photothermal conversion and in vitro bacteria-killing performance, together with our endeavors to understand the mechanism fundamentally. By adopting the rationally screened capping agent docosyltrimethylammonium chloride (DCTAC) throughout the stepwise synthesis, sharp cubic edges could be generated and largely reserved, leaving the 5 nm cubic nanoframes well standing. The increase in the cubic edge length leads to the red shift of the major LSPR absorption peak toward the NIR region, and abundant hot-spots appear at the frame corner and core surface according to finite-difference time-domain (FDTD) simulation. The photothermal conversion efficiency of YSCNFs can reach as high as 65.6% when a very low power density of 0.27 W cm–2 is used, which displays a powerful ability in combating multidrug-resistant bacteria. The present study offers a systematic investigation of bimetallic yolk–shell nanoframes including size/morphology control, photothermal properties, mechanism studies, and antibacterial applications, which could be of great value for the rational design of high-efficiency photothermal nanomaterials for services to biomedicine.

show abstract

Section: Introductionmentioning

confidence: 99%

Size-Tunable Yolk–Shell Gold–Silver Nanostructures for Photothermal Treatment of Multidrug-Resistant Bacteria

Zhang

Tan

Yang

et al. 2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

show abstract

“…Besides, high odor concentrations can cause severe diseases and even death, − for example, it can be fatal in a short time when slightly high concentrations of hydrogen sulfide are inhaled. In addition, low concentrations of hydrogen sulfide can affect the eyes, respiratory system, and central nervous system . Therefore, the effective identification of odor gas is of great significance to the prevention of odor pollution.…”

Section: Introductionmentioning

confidence: 99%

Metal–Organic Framework Nanoparticle Films for Surface-Enhanced Raman Spectroscopy-Based Autograding in the Odor Intensity of Gas Mixture Generated from Kitchen Waste

Xie

Wang

et al. 2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

As few odorous molecules in a gas mixture make a great contribution to its odor intensity, autograding in odor intensity is the key process and of great challenge in the prevention of odor pollution. In this work, the surface-enhanced Raman spectroscopy (SERS) spectra of a gas mixture from kitchen waste are detected on plasmonic MOF nanoparticle (NP) films for autograding in odor intensity. To obtain plasmonic MOF NP films with high SERS sensitivity, AgNP@ZIF-8 NPs with different shell thicknesses and adsorbing times are investigated, which is further confirmed by the simulation of electric field distribution and airflow distribution. Then, a 45 nm shell thickness and 3H adsorbing time are selected to collect the SERS spectra of the gas mixture from kitchen waste with different odor intensities. These SERS spectra point out that the odorous molecules generated from the different statuses of kitchen waste dominate the odor intensity of the gas mixture. Furthermore, autograding in odor intensities with four levels based on deep learning (DL) is achieved here. The results exhibit excellent diagnostic accuracy (93.3%) for the external held-out overall dataset, which indicates that a highthroughput, rapid, and label-free tool for screening odor intensities could be developed. Our work not only enriches the research of gas detection by SERS spectra but also improves the prevention technique of odor pollution.

show abstract

“…In chondrocytes, H 2 S was induced by regulating cysteine-β-synthase and cysteine-γ-lyase, which significantly inhibited chondrocyte oxidative stress-induced cell death [4,5]. Many instrumental methods, such as the electrochemical method [6,7], colorimetric method [8,9], fluorescence spectroscopy [10,11], electrochemiluminescence (ECL) method [12], and surface-enhanced Raman scattering [13], were applied for H 2 S determination in different samples. Among these methods, most of them were aimed at the detection of total sulfur ion in biological samples, and the limit of detection of H 2 S was generally at the micromolar level.…”

Section: Introductionmentioning

confidence: 99%

Signal-On and Highly Sensitive Electrochemiluminescence Biosensor for Hydrogen Sulfide in Joint Fluid Based on Silver-Ion-Mediated Base Pairs and Hybridization Chain Reaction

Chen

Lin

et al. 2022

Chemosensors

Self Cite

View full text Add to dashboard Cite

Hydrogen sulfide (H2S) in joint fluid acts as a signal molecule to regulate joint inflammation. Direct detection of H2S in joint fluid is of great significance for the diagnosis and treatment of arthritis. However, due to the low volume of joint fluid and low H2S concentration, existing methods face the problem of the insufficient limit of detection. In this study, a highly sensitive biosensor was proposed by designing a primer probe and combining it with hybrid chain reaction (HCR) under the strong interaction between metal ions and H2S to achieve H2S detection. The primer probe containing multiple cytosine (C) sequences was fixed on a gold electrode, and the C–Ag–C hairpin structure was formed under the action of Ag+. In the presence of H2S, it can combine with Ag+ in the hairpin structure to form Ag2S, which leads to the opening of the hairpin structure and triggers the hybridization chain reaction (HCR) with another two hairpin structures (H1 and H2). A large number of double-stranded nucleic acid structures can be obtained on the electrode surface. Finally, Ru(phen)32+ can be embedded into the double chain structure to generate the electrochemiluminescence (ECL) signal. The linear response of the H2S biosensor ranged from 0.1000 to 1500 nM, and the limit of detection concentration of H2S was 0.0398 nM. The developed biosensor was successfully used to determine H2S in joint fluid.

show abstract

Convenient detection of H2S based on the photothermal effect of Au@Ag nanocubes using a handheld thermometer as readout

Cited by 19 publications

References 36 publications

Size-Tunable Yolk–Shell Gold–Silver Nanostructures for Photothermal Treatment of Multidrug-Resistant Bacteria

Size-Tunable Yolk–Shell Gold–Silver Nanostructures for Photothermal Treatment of Multidrug-Resistant Bacteria

Metal–Organic Framework Nanoparticle Films for Surface-Enhanced Raman Spectroscopy-Based Autograding in the Odor Intensity of Gas Mixture Generated from Kitchen Waste

Signal-On and Highly Sensitive Electrochemiluminescence Biosensor for Hydrogen Sulfide in Joint Fluid Based on Silver-Ion-Mediated Base Pairs and Hybridization Chain Reaction

Contact Info

Product

Resources

About