Sucrose capped gold nanoparticles as a plasmonic chemical sensor based on non-covalent interactions: Application for selective detection of vitamins B1 and B6 in brown and white rice food samples

Shrivas, Kamlesh; Nirmalkar, Nidhi; Thakur, Santosh Singh; Deb, Manas Kanti; Shinde, Sandip S.; Shankar, Ravi

doi:10.1016/j.foodchem.2018.01.002

Cited by 48 publications

(24 citation statements)

References 38 publications

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“…2. SPR is due to mutual vibrations of the free conduction electrons in resonance with light, which is influenced by the size and shape of the synthesized nanoparticles 19 . The maximum absorption λ max peaks of the synthesized AgNPs at pH 6 and pH 10 were 452 nm and 439 nm, respectively.…”

Section: Resultsmentioning

confidence: 99%

Effect of pH on Size and Concentration of Silver Nanoparticles Synthesized using Ixora coccinea Linn. Leaf Extracts

et al. 2020

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The synthesis of silver nanoparticles via plant-mediated approach is an emerging area of research interest worldwide. The procedure is cost-effective and does not require the use of toxic chemicals and complicated reaction conditions. In the present investigation, silver nanoparticles were prepared using the leaf extracts of Ixora coccinea Linn., a common ornamental shrub in the Philippines, as the reducing agent. The effect of pH on the synthesis was investigated, and results showed that the quality of the synthesized silver nanoparticles changes in varying pH of the reducing agent.

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Section: Resultsmentioning

confidence: 99%

Effect of pH on Size and Concentration of Silver Nanoparticles Synthesized using Ixora coccinea Linn. Leaf Extracts

et al. 2020

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“…Using this new technology, tumors with a few millimetres diameter in vivo can be detected, which is of great significance for early diagnosis. [54]…”

Section: Aunps In Cancer Managementmentioning

confidence: 99%

Progress in research on gold nanoparticles in cancer management

2019

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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.

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“…The results are depicted in Figure 3(c-j). The LSPR of NPs is dependent on the particle size, shape and the inter-particle distance, the adsorbed species on the surface NPs and the dielectric constant of the surrounding medium [50,51,52]. Based on the long-time storage property at room temperature without aggregation of particles in presence of analyte, the Cys-capped AgNPs is more stable than gold (Au 0 ) and copper (Cu 0 ) NPs.…”

Section: Selection Of Agnps As a Chemical Sensor For Detection Of Vitmentioning

confidence: 99%

“…Important parameters such as linearity range, limit of detection (LOD), limit of quantification (LOQ), correlation coefficient (R 2 ), selectivity, accuracy and precision for the determination of vitamin B1 were estimated to determine the plausibility of using Cys-capped AgNPs as a chemical sensor. The calibration curve was prepared for vitamin B1 by adding different concentrations of vitamin B1 (25,50,100,200, 300 and 500 μg mL À1 ) in different glass vials containing 1.0 mL of Cys-capped AgNPs at pH 5.0 and the total volume was maintained at 5.0 mL with ultrapure water. Different concentrations of vitamin B1 solutions ranging from 25-500 μg mL À1 were used to test the sensitivity level of this method.…”

Section: Analytical Evaluation For Determination Of Vitamin B1 Using mentioning

confidence: 99%

L-cysteine modified silver nanoparticles for selective and sensitive colorimetric detection of vitamin B1 in food and water samples

Khalkho

Kurrey

Deb

et al. 2020

Heliyon

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The use of L-cysteine modified silver nanoparticles (Cys-capped AgNPs) as a colorimetric probe for determination of vitamin B1 (thiamine) is described in the present work. This method is based on the measurement of red shift of localized surface plasmon resonance (LSPR) band of Cys-capped AgNPs in the region of 200-800 nm. The color of Cys-capped AgNPs was changed from yellow to colorless by the addition of vitamin B1. The mechanism for detection of vitamin B1 is based on the electrostatic interaction between positively charged vitamin B1, which causes the red shift of LSPR band from 390 nm to 580 nm. The interaction between Cys-capped AgNPs and vitamin B1 was theoretically explored by density function theory (DFT) using LANL2DZ basis sets with help of Gaussian 09 (C.01) program. The morphology, size distribution and optical properties of Cys-capped AgNPs were characterized by transmission electron microscope (TEM), UV-Visible spectrophotometry, Fourier transform infrared spectroscopy (FTIR) and dynamic light scattering (DLS) techniques. The method is linear in the range of 25-500 μg mL À1 with correlation coefficient (R 2) 0.992 and limit of detection of 7.0 μg mL À1. The advantages of using Cys-capped AgNPs as a chemical sensor in colorimetry assay are being simple, low cost and selective for detection of vitamin B1 from food (peas, grapes and tomato) and environmental (river, sewage and pond) water samples.

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Sucrose capped gold nanoparticles as a plasmonic chemical sensor based on non-covalent interactions: Application for selective detection of vitamins B1 and B6 in brown and white rice food samples

Cited by 48 publications

References 38 publications

Effect of pH on Size and Concentration of Silver Nanoparticles Synthesized using Ixora coccinea Linn. Leaf Extracts

Effect of pH on Size and Concentration of Silver Nanoparticles Synthesized using Ixora coccinea Linn. Leaf Extracts

Progress in research on gold nanoparticles in cancer management

L-cysteine modified silver nanoparticles for selective and sensitive colorimetric detection of vitamin B1 in food and water samples

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