Detection of Chlortetracycline Hydrochloride in Milk with a Solid SERS Substrate Based on Self-assembled Gold Nanobipyramids

Li, Nan; Han, Siqingaowa; Zhang, Chen; Lin, Shuang; Sha, Xuanyu; Hasi, Wuliji

doi:10.2116/analsci.19p476

Cited by 15 publications

(8 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Table 2 briefly lists the relevant studies on trace detection of tetracycline based on SERS techniques. In some studies, the SERS signals were collected in solution, while in other studies, the researchers either dropped the analyte solution on the substrate and measured it after the solvent was evaporated [ 9,10,15 ] or took out the substrate from the solution and dried it before collecting signals. [ 11,12 ] From our point of view, the TC solution dropped on the substrate will appear coffee ring effect due to the different evaporation rates in the central region and the edge region, leading to uneven SERS signals, while the substrate taken out from the solution cannot accurately reflect the real concentration of the solution either due to evaporation and concentration.…”

Section: Resultsmentioning

confidence: 99%

Section: Trace Detection Of Organic Dyesmentioning

confidence: 99%

“…[ 1,2 ] Since the first demonstration of SERS for single‐molecule detection in 1997, [ 3,4 ] SERS‐based trace analysis has attracted tremendous interests and achieved rapid development in various fields including food security, environment, biology, medical treatment, and military. [ 5 ] For instance, SERS‐based trace detection of dyes, explosives, pesticides, and antibiotics residues have been largely reported in recent studies, [ 6–15 ] showing extremely high sensitivity and convenience for in situ analysis. Despite of these precious advantages, the poor reproducibility of SERS signals from spot to spot and substrate to substrate during detection remains a great challenge hindering its real‐world applications.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Reproducible fabrication of gold nanostar monolayers for surface‐enhanced Raman spectroscopy‐based trace detection

Zhang

Yang

Wang

et al. 2022

J Raman Spectroscopy

View full text Add to dashboard Cite

Rapid, simple, and reliable detection of toxics at trace level is of great significance for public health. Surface‐enhanced Raman spectroscopy (SERS) as a powerful vibrational spectroscopic technique for molecules probing provides great advantages in trace detection; however, the low reproducibility of SERS signals from spot to spot and substrate to substrate remains a great challenge restricting its real applications. Here, we report a facile method for reproducibly preparing highly uniform self‐assembled monolayers of gold nanostars (Au NSs SAM) as SERS substrates using the classic Langmuir–Blodgett technique and introduced a statistical method to explore the signal reproducibility by t test. Our results show that the Au NSs SAM substrates fabricated in the same batch and different batches generated constant SERS signals without statistical differences and could detect dye molecules CV, R6G, and RhB in solution at concentrations as low as 10−8, 10−8, and 10−7 M, respectively. We then applied the Au NSs SAM for trace detection of Tetracycline (TC), one of the most widespread antibiotics entering the food chain and threatening the ecological balance. A detection limit of 0.05 μg/ml was achieved, with a linear response between SERS signal and TC concentration in the range of 0.05–10 μg/ml. Overall, this uniform Au NSs SAM could be reproducibly fabricated to provide a reliable platform for trace detection of TC residues or other toxics in water and is expected to have broad applications in different fields including environmental monitoring, food security, and so on.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Trace Detection Of Organic Dyesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Reproducible fabrication of gold nanostar monolayers for surface‐enhanced Raman spectroscopy‐based trace detection

Zhang

Yang

Wang

et al. 2022

J Raman Spectroscopy

View full text Add to dashboard Cite

show abstract

“…Even single molecules can be detected. [9][10][11] When the SERS substrate interacts with electromagnetic waves, the local surface plasmons excited by the electromagnetic waves on the rough metal surface causes the electric field near the surface to amplify and produce hotspots, which increases the SERS signal intensity. 12,13 With the development of SERS technology, some scholars have used the preparation of functionalized SERS substrates to detect heavy metal ions.…”

Section: Introductionmentioning

confidence: 99%

Detection of Soluble Mercury in Cinnabar Using a CV-Ag NPs SERS Probe

Han

Lin

et al. 2021

ANAL. SCI.

Self Cite

View full text Add to dashboard Cite

In this paper, the uniform morphological Ag nanoparticles (Ag NPs) were prepared with ascorbic acid as the reducing agent and citrate as the stabilizer. The surface of Ag NPs modified by crystal violet (CV) and potassium iodide (KI) is used as the aggregation agent to obtain CV modified Ag NPs (CV-Ag NPs) probes for detecting mercury ions.The mercury ions can be reduced to mercury molecules by citrate, and then deposited them on the surface of Ag NPs, leading to the separation of CV molecules from the surface of Ag NPs. Therefore, the SERS signal intensity of CV decreases with the increase of Hg 2+ concentration and the concentration of Hg 2+ is in the range of 110 -11 to 110 -5 M. Taking the change of the characteristic peak intensity of CV at 913 cm -1 as a reference, the SERS spectrum intensity of CV has a linear relationship with the Hg 2+ concentration. The equation is y=-333.55*x+1343.05 with the linear correlation coefficient is R 2 =0.980, and the recovery rate is between 84.20% to 105.60%. Finally, the CV-Ag NPs probe was used to quickly detect the soluble mercury in cinnabar.Compared with the conventional large-scale instrument detection method, this simple and fast method, can be applied for the rapid detection of soluble mercury, and has a certain significance for the research of mineral medicine processing mechanism.

show abstract

“…8 The shape-dependent properties have enabled applications in various fields ranging from optical sensing to theraputics. [9][10][11][12][13] Manipulating the assembly and thereby the optical properties of anisotropic AuNPs are essential toward the various applications. DNA has emerged as a powerful tool in this regard owning to its programmable base pairing and rich chemical functionality.…”

Section: Introductionmentioning

confidence: 99%

DNA Base Pair Stacking Assembly of Anisotropic Nanoparticles for Biosensing and Ordered Assembly

Wang

Liang

et al. 2020

ANAL. SCI.

View full text Add to dashboard Cite

Anisotropic gold nanoparticles have attracted great interest due to their unique physicochemical properties derived from the shape anisotropy. Manipulation of their interfacial interactions, and thereby the assembling behaviors are often requisite in their applications ranging from optical sensing and diagnosis to self-assembly. Recently, the control of interfacial force based on base pair stacking of DNA terminals have offered a new avenue to surface engineering of nanostructures. In this review, we focus on the DNA base stacking-induced assembly of anisotropic gold nanoparticles, such as nanorods and nanotriangles. The fundamental aspects of anisotropic gold nanoparticles are provided, including the mechanism of the anisotropic growth, the properties arising from the anisotropic shape, and the construction of DNA-grafted anisotropic gold nanoparticles. Then, the advanced applications of their functional assemblies in biosensing and ordered assembly are summarized, followed by a comparison with gold nanospheres. Finally, conclusions and outlooks are given with challenges and opportunities on the futuristic directions in this field.

show abstract

Detection of Chlortetracycline Hydrochloride in Milk with a Solid SERS Substrate Based on Self-assembled Gold Nanobipyramids

Cited by 15 publications

References 27 publications

Reproducible fabrication of gold nanostar monolayers for surface‐enhanced Raman spectroscopy‐based trace detection

Reproducible fabrication of gold nanostar monolayers for surface‐enhanced Raman spectroscopy‐based trace detection

Detection of Soluble Mercury in Cinnabar Using a CV-Ag NPs SERS Probe

DNA Base Pair Stacking Assembly of Anisotropic Nanoparticles for Biosensing and Ordered Assembly

Contact Info

Product

Resources

About