Analyte induced AuNPs aggregation enhanced surface plasmon resonance for sensitive detection of paraquat

Dong, Haibin; Zou, Fangxin; Hu, Xiaojun; Zhu, Han; Koh, Kwangnak; Chen, Hongxia

doi:10.1016/j.bios.2018.06.057

Cited by 52 publications

(21 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, 13-nm gold nanoparticles have a maximum absorption wavelength at 523 nm and are wine red. An increase in the particle size or decrease in the interparticle distance causes a redshift of the maximum adsorption wavelength and a color change (faint yellow, wine red, purple red, blue) [55,75,76]. Liu et al [55] developed a simple and sensitive colorimetric sensor to detect atrazine by using cysteamine–gold nanoparticles, changes in the colors and UV-visible spectra of a cysteamine–gold nanoparticle solution with different concentrations of atrazine were shown in Figure 4.…”

Section: Optical Properties Of Gold Nanoparticlesmentioning

confidence: 99%

Application of Gold-Nanoparticle Colorimetric Sensing to Rapid Food Safety Screening

Liu

Huang

et al. 2018

Sensors

162

View full text Add to dashboard Cite

Due to their unique optical properties, narrow size distributions, and good biological affinity, gold nanoparticles have been widely applied in sensing analysis, catalytic, environmental monitoring, and disease therapy. The color of a gold nanoparticle solution and its maximum characteristic absorption wavelength will change with the particle size and inter-particle spacing. These properties are often used in the detection of hazardous chemicals, such as pesticide residues, heavy metals, banned additives, and biotoxins, in food. Because the gold nanoparticles-colorimetric sensing strategy is simple, quick, and sensitive, this method has extensive applications in real-time on-site monitoring and rapid testing of food quality and safety. Herein, we review the preparation methods, functional modification, photochemical properties, and applications of gold nanoparticle sensors in rapid testing. In addition, we elaborate on the colorimetric sensing mechanisms. Finally, we discuss the advantages and disadvantages of colorimetric sensors based on gold nanoparticles, and directions for future development.

show abstract

Section: Optical Properties Of Gold Nanoparticlesmentioning

confidence: 99%

Application of Gold-Nanoparticle Colorimetric Sensing to Rapid Food Safety Screening

Liu

Huang

et al. 2018

Sensors

162

View full text Add to dashboard Cite

show abstract

“…[11] For example, AuNPs can be used for MRI detection, and coupled with polyethylene glycol (PEG) molecules to increase the circulating time of nanoparticles in vivo, and so on. [12] In the adenocarcinoma mouse model, tumor-specific F3 peptides can be used as targeted transport, and adriamycin transport carriers have been proven to be effective. [13]…”

Section: Introductionmentioning

confidence: 99%

Progress in research on gold nanoparticles in cancer management

2019

View full text Add to dashboard Cite

Introduction: The rapid advancement of nanotechnology in recent years has fuelled burgeoning interest in the field of nanoparticle research, particularly its application in cancer management. At present, there seems to be heightened interest in the application of gold nanoparticles (AuNPs) to the management of cancer, encompassing diagnosis, monitoring, and treatment. AuNPs could be used as drug delivery agents that target cancer cells or in gene therapy. These efforts are undertaken in the hope of revolutionizing current methods and strategies for cancer treatment. This review will focus on the current applications of AuNPs in cancer management. Objectives, data sources, study appraisal and synthesis methods, results: objectives, data sources, study eligibility criteria, participants, and interventions, study appraisal and synthesis methods, results are not required, as the study will be a literature review. Just introduction, ethics and dissemination, and conclusion are applicable. Ethics and dissemination: Ethical approval and informed consent are not required, as the study is a literature review and does not involve direct contact with patients or alterations to patient care. Conclusion: AuNPs have many properties that are of great value for the diagnosis and treatment of tumors. AuNPs are small in size and can penetrate widely and deposit on the tumor site, bind to many proteins and drugs, target delivery drugs, and have good biocompatibility. The application of AuNPs in the diagnosis and treatment of tumors is very considerable. In the near future, AuNPs will certainly play an important role in the treatment of tumors.

show abstract

“…Gold nanoparticles (AuNPs) have been extensively discussed and used in a variety of areas, such as the catalysis [1], drug delivery [2], biomedical therapy [3], and environmental detection [4], due to their superior properties in the physical, chemical, and biological aspects. However, because of their colloidal nature and higher surface energies, AuNPs tended to aggregate during the synthesis process, which would cause great limitations in the application of their excellent properties.…”

Section: Introductionmentioning

confidence: 99%

AuNPs-Based Thermoresponsive Nanoreactor as an Efficient Catalyst for the Reduction of 4-Nitrophenol

Liu

Zhu

et al. 2018

Nanomaterials

View full text Add to dashboard Cite

A new AuNPs-based thermosensitive nanoreactor (SiO2@PMBA@Au@PNIPAM) was designed and prepared by stabilizing AuNPs in the layer of poly(N,N’-methylenebisacrylamide) (PMBA) and subsequent wrapping with the temperature-sensitive poly(N-isopropylacrylamide) (PNIPAM) layer. The new nanoreactor exhibited high dispersibility and stability in aqueous solution and effectively prevented the aggregation of AuNPs caused by the phase transformation of PNIPAM. The XPS and ATR-FTIR results indicated that AuNPs could be well stabilized by PMBA due to the electron transfer between the N atoms of amide groups in the PMBA and Au atoms of AuNPs. The catalytic activity and thermoresponsive property of the new nanoreactor were invested by the reduction of the environmental pollutant, 4-nitrophenol (4-NP), with NaBH4 as a reductant. It exhibited a higher catalytic activity at 20 °C and 30 °C (below LCST of PNIPAM), but an inhibited catalytic activity at 40 °C (above LCST of PNIPAM). The PNIPAM layer played a switching role in controlling the catalytic rate by altering the reaction temperature. In addition, this nanoreactor showed an easily recyclable property due to the existence of a silica core and also preserved a rather high catalytic efficiency after 16 times of recycling.

show abstract

Analyte induced AuNPs aggregation enhanced surface plasmon resonance for sensitive detection of paraquat

Cited by 52 publications

References 39 publications

Application of Gold-Nanoparticle Colorimetric Sensing to Rapid Food Safety Screening

Application of Gold-Nanoparticle Colorimetric Sensing to Rapid Food Safety Screening

Progress in research on gold nanoparticles in cancer management

AuNPs-Based Thermoresponsive Nanoreactor as an Efficient Catalyst for the Reduction of 4-Nitrophenol

Contact Info

Product

Resources

About