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Mao L, Zhang Y, Zhang H, Liu H, Gao YP. Anti-aggregation colorimetric sensing of cysteine using silver nanoparticles in the presence of Pb 2. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:2378-2385. [PMID: 38572618 DOI: 10.1039/d4ay00351a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
Using silver nitrate as the silver source and sodium borohydride as the reducing agent, we synthesized negatively charged silver nanoparticles (AgNPs). Subsequently, the AgNPs solution was mixed with positively charged lead ions, resulting in AgNPs aggregation via electrostatic interactions. This led to a color change in the solution from yellow to purple and eventually to blue-green. Our study focused on a colorimetric method that exhibited high selectivity and sensitivity in detecting cysteine using AgNPs-Pb2+ as a sensing probe. Upon the introduction of cysteine to the AgNPs-Pb2+ system, the absorbance of AgNPs increased at 396 nm and decreased at 520 nm. The formation of a complex between cysteine and lead ions prevented the aggregation of silver nanoparticles, enabling the colorimetric detection of cysteine. The relationship between the concentration of ΔA396/A520 and cysteine showed linearity within the range of 0.01 to 0.1 μM; the regression equation of the calibration curve is ΔA396/A520 = 9.0005c - 0.0557 (c: μM), with an R2 value of 0.9997. The detection limit was found to be 3.8 nM (S/N = 3). This method demonstrated exceptional selectivity and sensitivity for cysteine and was effectively used for the determination of cysteine in urine. Our findings offer a new perspective for the future advancement of anti-aggregation silver nanocolorimetry.
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Affiliation(s)
- Lihui Mao
- School of Science and Engineering, Xinyang College, Xinyang, 464000, China.
- School of Chemistry and Chemical Engineering, Guangxi Minzu University, Nanning, 530006, China
| | - Yi Zhang
- School of Science and Engineering, Xinyang College, Xinyang, 464000, China.
| | - Huan Zhang
- School of Science and Engineering, Xinyang College, Xinyang, 464000, China.
| | - Huili Liu
- School of Science and Engineering, Xinyang College, Xinyang, 464000, China.
| | - Yong-Ping Gao
- School of Science and Engineering, Xinyang College, Xinyang, 464000, China.
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Kumari S, Nehra M, Jain S, Dilbaghi N, Chaudhary GR, Kim KH, Kumar S. Metallosurfactant aggregates: Structures, properties, and potentials for multifarious applications. Adv Colloid Interface Sci 2024; 323:103065. [PMID: 38091690 DOI: 10.1016/j.cis.2023.103065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 11/30/2023] [Accepted: 12/01/2023] [Indexed: 01/13/2024]
Abstract
Metallosurfactants offer important scientific and technological advances due to their novel interfacial properties. As a special class of structures formed by the integration of metal ions into amphiphilic surfactant molecules, these metal-based amphiphilic molecules possess both organometallic and surface chemistries. This review critically examines the structural transitions of metallosurfactants from micelle to vesicle upon metal coordination. The properties of a metallosurfactant can be changed by tuning the coordination between the metal ions and surfactants. The self-assembled behavior of surfactants can be controlled by selecting transition-metal ions that enhance their catalytic efficiency in environmental applications by applying a hydrogen evolution reaction or oxygen evolution reaction. We present the different scattering techniques available to examine the properties of metallosurfactants (e.g., size, shape, structure, and aggregation behavior). The utility of metallosurfactants in catalysis, the synthesis of nanoparticles, and biomedical applications (involving diagnostics and therapeutics) is also explored.
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Affiliation(s)
- Sonam Kumari
- Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University Chandigarh, 160014, India; Department of Bio and Nano Technology, Guru Jambheshwar University of Science and Technology, Hisar, Haryana, 125001, India
| | - Monika Nehra
- Department of Mechanical Engineering, University Institute of Engineering and Technology, Panjab University, Chandigarh 160014, India
| | - Shikha Jain
- Department of Bio and Nano Technology, Guru Jambheshwar University of Science and Technology, Hisar, Haryana, 125001, India
| | - Neeraj Dilbaghi
- Department of Bio and Nano Technology, Guru Jambheshwar University of Science and Technology, Hisar, Haryana, 125001, India
| | - Ganga Ram Chaudhary
- Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University Chandigarh, 160014, India
| | - Ki-Hyun Kim
- Department of Civil & Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul 04763, Republic of Korea.
| | - Sandeep Kumar
- Department of Bio and Nano Technology, Guru Jambheshwar University of Science and Technology, Hisar, Haryana, 125001, India; Physics Department, Punjab Engineering College (Deemed to be University), Chandigarh 160012, India.
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