In situ regulation nanoarchitecture of Au nanoparticles/reduced graphene oxide colloid for sensitive and selective SERS detection of lead ions

Zhao, Longyun; Gu, Wei; Zhang, Cuiling; Shi, Xinhao; Xian, Yuezhong

doi:10.1016/j.jcis.2015.11.073

Cited by 66 publications

(24 citation statements)

References 44 publications

(46 reference statements)

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“…As oligonucleotides, high stability DNAzymes can be conveniently synthesized at low cost and DNAzyme-based sensors have demonstrated a series of advantages such as fast analysis, nondestructive detection and the capability of providing in situ and real-time information [18,19,20], and thus they have been widely recognized as promising candidates for the development of metal ion sensors. Recently, the research on Pb 2+ sensors based on Pb 2+ -specific DNAzymes has attracted plenty of research interest.…”

Section: Introductionmentioning

confidence: 99%

A Sensitive and Label-Free Pb(II) Fluorescence Sensor Based on a DNAzyme Controlled G-Quadruplex/Thioflavin T Conformation

Wen

Wang

et al. 2016

Sensors

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Pb(II) can cause serious damaging effects to human health, and thus, the study of Pb2+ detection methods to sensitively and selectively monitor Pb(II) pollution has significant importance. In this work, we have developed a label-free fluorescence sensing strategy based on a Pb(II) DNAzyme cleavage and the ThT/G-quadruplex complex. In the presence of Pb(II), a G-rich tail was cut and released from the substrate strand, which then would form a G-quadruplex structure by combination with ThT dye. The fluorescence signal increase was then measured for sensitive Pb(II) quantification with a limit of detection of 0.06 nM. Our sensor also demonstrated high selectivity against six different metal ions, which is very important for the analysis of complex samples.

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Section: Introductionmentioning

confidence: 99%

A Sensitive and Label-Free Pb(II) Fluorescence Sensor Based on a DNAzyme Controlled G-Quadruplex/Thioflavin T Conformation

Wen

Wang

et al. 2016

Sensors

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“…Li et al also presented similar sensor applying Pb 2+ aptamer [ 50 ]. Besides, citrate functionalized gold nanoparticle [ 51 ], aminobenzo-18-crown-6 [ 52 ], the colloid of AuNPs/reduced graphene oxide [ 53 ] (rGO) were respectively used as the SERS substrates for selective determination of Pb 2+ . Yu et al reported SERS chips for the simultaneous quantification of Pb 2+ and Hg 2+ , with the combination of silicon nanohybrid as substrates and an internal standard sensing strategy [ 54 ].…”

Section: Sers Applications In the Detection Of Stress Factorsmentioning

confidence: 99%

Applications of SERS in the Detection of Stress-Related Substances

Chen

Tang

et al. 2018

Nanomaterials

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A wide variety of biotic and abiotic stresses continually attack plants and animals, which adversely affect their growth, development, reproduction, and yield realization. To survive under stress conditions, highly sophisticated and efficient tolerance mechanisms have been evolved to adapt to stresses, which consist of the variation of effector molecules playing vital roles in physiological regulation. The development of a sensitive, facile, and rapid analytical methods for stress factors and effector molecules detection is significant for gaining deeper insight into the tolerance mechanisms. As a nondestructive analysis technique, surface-enhanced Raman spectroscopy (SERS) has unique advantages regarding its biosensing applications. It not only provides specific fingerprint spectra of the target molecules, conformation, and structure, but also has universal capacity for simultaneous detection and imaging of targets owing to the narrow width of the Raman vibrational bands. Herein, recent progress on biotic and abiotic stresses, tolerance mechanisms and effector molecules is summarized. Moreover, the development and promising future trends of SERS detection for stress-related substances combined with nanomaterials as substrates and SERS tags are discussed. This comprehensive and critical review might shed light on a new perspective for SERS applications.

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“…In recent years, Raman probes or sensors which originating from surface‐enhanced (SERS) Raman scattering has attracted broad interest in scientific community due to its unique optical properties and wide applications . A good substrate for Raman probes is the key point to get high sensitivity.…”

Section: Introductionmentioning

confidence: 99%

In‐Situ covalent synthesis of gold nanorods on GO surface as ultrasensitive Raman probe

Guo

Geng

et al. 2019

Applied Organom Chemis

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In this paper, using thiolated graphene oxide (GO‐O‐SH) as substrate, gold nanorods (AuNRs) covalently linked to the GO surface by in‐situ seed growth method were first reported. The as‐prepared composites were characterized by UV–vis spectrum, transmission electron microscopy (TEM), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT‐IR). Experimental results indicated that the introduction of short flexible organic chain between GO and AuNRs contributed to the homogenous synthesis of gold rods, and uniform gold nanorods with aspect ratio within 3~8 were covalently linked to the surface of GO with high stability and yield. The strategy represented an outstanding improvement in comparison to the traditional route for fabricating GO@AuNRs composites. Furthermore, based on coupling of the two nanomaterials, the composites could act as high sensitive Raman probe with limit of detection (LOD) reaching 1 × 10−12 M.

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In situ regulation nanoarchitecture of Au nanoparticles/reduced graphene oxide colloid for sensitive and selective SERS detection of lead ions

Cited by 66 publications

References 44 publications

A Sensitive and Label-Free Pb(II) Fluorescence Sensor Based on a DNAzyme Controlled G-Quadruplex/Thioflavin T Conformation

A Sensitive and Label-Free Pb(II) Fluorescence Sensor Based on a DNAzyme Controlled G-Quadruplex/Thioflavin T Conformation

Applications of SERS in the Detection of Stress-Related Substances

In‐Situ covalent synthesis of gold nanorods on GO surface as ultrasensitive Raman probe

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