We for the first time confirmed that the low concentrations of Ag(I) could induce a silver specific aptamer probe (SAP) from a random coil sequence form to G-quadruplex structure. Thereby, a novel highly sensitive fluorescence strategy for silver(I) assay was established. The designed multifunctional SAP could act as a recognition element for Ag(I) and a signal reporter. The use of such a SAP can ultrasensitively and selectively detect Ag(I), giving a detection limit down to 0.64nM. This is much lower than those reported by related literatures. This strategy has been applied successfully for the detection of Ag(I) in real samples, further proving its reliability. Taken together, the designed SAP is not only a useful recognition and signal probe for silver, but also gives a platform to study the interaction of monovalent cations with DNA.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.saa.2017.08.022 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Organic photoelectrochemical transistor based on titanium dioxide nanorods for detection of Microcystin-LR.
Talanta
December 2024
Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China. Electronic address:
A more efficient signal amplification strategy is needed to improve the performance of promising photoelectrochemical sensors (PEC). Organic photoelectrochemical transistor (OPECT) sensors are of growing interest in many fields, but their potential has not yet been widely exploited and remains a challenge. In this study, a novel organic photoelectrochemical transistor aptamer (OPECT) biosensor combining photoelectrochemical analysis and organic electrochemical transistor with AgI-TiO (AgI-TNs) as photoreactive material and target-specific DNA chain reaction hybridization as signal amplifier for microcystin-LR detection was developed.
View Article and Find Full Text PDFEffect of Anion-Directed Structural Tuning of Triazole-Containing Ag(I) Coordination Polymers for "Turn-on" Sensing of the Disulfide (-S-S-) Amino Acid over the Monosulfide (-SH) Form: Experiments and DFT Corroboration.
Inorg Chem
December 2024
School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China.
Identification of disulfide-peptide-bond-containing glutathione (GSSG) over the monosulfide form (GSH) remains a very challenging task because of their identical chemical properties. Although GSH detection has been well documented, selective detection of GSSG has rarely been reported. Here, four cationic Ag-based coordination polymers (Ag CPs) were synthesized using newly synthesized monotriazole linker 3-amino-5-(4-1,2,4-triazol-4-yl)pyridine to selectively screen GSSG over GSH.
View Article and Find Full Text PDFPortable Capillary-Microplasma Optical Emission Spectrometer: Gold-Labeled and Silver-Stained Signal Amplification for Carcinoembryonic Antigen Detection.
Anal Chem
December 2024
Key Lab of Land Resources Evaluation and Monitoring in Southwest, Ministry of Education, College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, Sichuan 610068, China.
Article Synopsis
- Signal amplification techniques using catalytic silver deposition on immunogold labels have been improved for immunoassays, but traditional devices are often too big, expensive, and complicated for point-of-care testing.
- Researchers have developed a new, portable 3D-printed device that combines capillary liquid electrode glow discharge (CLEGD) and optical emission spectrometry (OES) for detecting carcinoembryonic antigen (CEA) in small samples effectively.
- This innovative system can detect Ag(I) as low as 0.9 ng/mL and shows similar detection capabilities to more complex systems, covering a linear range of 1-500 ng/mL for CEA quantification.
IODINE NUTRITIONAL STATUS AND GOITRE PREVALENCE IN CHILDREN AGED 2 - 14 YEARS IN SELECTED UPLAND AND RIVERINE COMMUNITIES IN RIVERS STATE, NIGERIA.
West Afr J Med
November 2024
Department of Paediatrics, University of Port Harcourt Teaching Hospital, Rivers State, Nigeria. Email:
Background: Iodine deficiency is a common cause of thyroid disease, prompting the World Health Organisation to recommend universal salt iodification. The iodine status of Rivers State is yet to be investigated following the implementation of this strategy.
Objective: To determine and compare the iodine nutritional status of children aged 2-14 years resident in selected upland and riverine communities in Rivers State, Nigeria.
Synthesis and application of silver nanoparticles from lemon peel extract and other local plant extracts for detection of "blood" at crime scene.
Forensic Sci Int
December 2024
Research Centre for Forensic Sciences, Department of Chemical Sciences, University of Johannesburg, DFC Campus, 55 Beit Street, Doornfontein, Johannesburg 2028, South Africa. Electronic address:
This study reports the enhancement of luminol's sensitivity for blood detection at a crime scene. Silver nanoparticles (AgNPs) were synthesized from the extracts derived from Citrus limon peels, Aloe vera leaves, Capsicum annuum barks from Salix alba, Crinum asiaticum Linn leaves, and Crinum macowanii bulb using green chemistry procedure. Synthesis of silver nanoparticles followed a green chemistry method utilizing water as a solvent, with the phytochemicals from the extracts acting as stabilizing and reducing agents to reduce Ag(I) to Ag(0).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!