SDS bubbles functionalized with Gold nanoparticles and SERS applications

Navarro-Badilla, A.; Hurtado, R. Britto; Cortez-Valadez, M.; Pérez-Rodríguez, A.; Flores-Acosta, M.; Maldonado-Arce, Amir

doi:10.1016/j.physe.2016.11.014

Cited by 9 publications

(3 citation statements)

References 27 publications

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“…It should be noted that the SDS concentration used in the present study was greater than the aqueous critical micelle concentration (CMC) of SDS (8 mM); therefore, the micellar phase was formed . Interestingly, it was previously reported in the literature that the SDS micelle can behave as a soft template for the enlargement of AuNPs , and serve as a stabilizer for AuNPs. , Accordingly, SDS was selected as the optimal surfactant for the present study. In parallel, we also studied the effect of SDS concentration.…”

Section: Results and Discussionmentioning

confidence: 92%

“…34 Interestingly, it was previously reported in the literature that the SDS micelle can behave as a soft template for the enlargement of AuNPs 35,36 and serve as a stabilizer for AuNPs. 37,38 Accordingly, SDS was selected as the optimal surfactant for the present study. In parallel, we also studied the effect of SDS concentration.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Amplification-free DNA Sensor for the One-Step Detection of the Hepatitis B Virus Using an Automated Paper-Based Lateral Flow Electrochemical Device

et al. 2020

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Until now, an electrochemical lateral flow assay (eLFA) capable of detecting nucleic acids has remained a challenge and has been scarcely explored because of its complicated multistep nature. Here, we report an automated paper-based eLFA device for the quantitative detection of the hepatitis B virus (HBV)the major cause of liver cirrhosis and hepatocellular carcinoma (HCC). Using a time-delayed microfluidic strategy fabricated on paper, an automated and precisely sequenced solution transfer was enabled by single sample loading. A gold metallization strategy was employed for the signal-on electrochemical detection of the target DNA. Furthermore, a pyrrolidinyl peptide nucleic acid (so-called "acpcPNA") was used as a probe in this study because it offers higher specificity and yields lower background currents than those of traditional probes. Under optimal conditions, a broad dynamic range (10 pM to 2 μM) with an excellent detection limit (down to 7.23 pM) was achieved. The overall operation can be completed within 7 min of sample loading. The proposed sensor was successfully applied in HBV DNA detection in sera from patients without any amplification step (e.g., PCR) required, thus simplifying the operation further. Additionally, the results obtained from this present device are in accordance with the standard real-time PCR, thus supporting the accuracy of the method.

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Section: Results and Discussionmentioning

confidence: 92%

Section: ■ Results and Discussionmentioning

confidence: 99%

Amplification-free DNA Sensor for the One-Step Detection of the Hepatitis B Virus Using an Automated Paper-Based Lateral Flow Electrochemical Device

et al. 2020

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“…A variety of drugs, ligands, or imaging contrast agents have been conjugated to GNPs for creation of a multifunctional nanomaterial for myriad applications [14, 15]. Surface plasmon resonance is one of the most intriguing properties of GNPs [16]. Compared with other types of GNPs, GNRs exhibit significant advantages, including localised surface plasmon resonance properties, which can be tuned by controlling their sizes, shapes, and aspect ratios [17].…”

Section: Introductionmentioning

confidence: 99%

Highly efficient polyethylene glycol‐functionalised gold nanorods for photothermal ablation of hepatocellular carcinoma cells

Lin

2019

IET Nanobiotechnology

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Gold nanorods (GNRs) with exceptional photothermal properties have held promising potential for application in the biomedical field. In this study, the authors achieved photothermal ablation by polyethylene glycol (PEG)-functionalised GNRs. Well-dispersed and uniform GNRs were produced through a seed-mediated growth method. A thermal camera was used to scrutinise the temperature distribution and efficiency of the photothermal properties of the GNRs, which were irradiated by an 808 nm laser on a silicon chip. They observed that the GNRs provided about a 5°C temperature increase and produced hyperthermia efficiently. Since GNRs need to be surface tailored with a biocompatible material rather than cetyltrimethylammonium bromide (CTAB), they chose methoxyl PEG thiol to modify the GNRs. By taking advantage of the alkaline environment that assists this functionalisation, they accomplished about 89% removal of CTAB and identified a PEG layer on the surface of the GNRs. The GNR biocompatibility was considerably improved without any shift of the optical properties. Hepatocellular carcinoma cells were incubated with GNRs for 24 h and then were irradiated with a near-infrared laser for 3 min. Few cells remained alive, which demonstrated the photothermal ablation ability of the GNRs.

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Agglomerates of Au-Pt bimetallic nanoparticles: synthesis and antibacterial activity

et al. 2020

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SDS bubbles functionalized with Gold nanoparticles and SERS applications

Cited by 9 publications

References 27 publications

Amplification-free DNA Sensor for the One-Step Detection of the Hepatitis B Virus Using an Automated Paper-Based Lateral Flow Electrochemical Device

Amplification-free DNA Sensor for the One-Step Detection of the Hepatitis B Virus Using an Automated Paper-Based Lateral Flow Electrochemical Device

Highly efficient polyethylene glycol‐functionalised gold nanorods for photothermal ablation of hepatocellular carcinoma cells

Agglomerates of Au-Pt bimetallic nanoparticles: synthesis and antibacterial activity

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