Visual colorimetric sensing of copper ions based on reproducible gelatin functionalized silver nanoparticles and gelatin hydrogels

Jeevika, Alagan; Shankaran, Dhesingh Ravi

doi:10.1016/j.colsurfa.2014.08.002

Cited by 39 publications

(11 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The reactions between H 2 O 2 and PVP coated AgNPs have already been confirmed [9][10][11]. On the other hand, the color change attributed to Cu 2+ can be explained as a consequence of its ability to oxidize Ag [14,15] since the standard potential in the existence of Cl − becomes AgCl + e − = Ag + Cl − +0.222V Cu 2+ + Cl − + e − = CuCl + 0.570V Furthermore, it was confirmed that the solution color changed in response to NaOH while the hydrogel color remained unchanged. In the nanoparticle solution, electrostatic repulsion weakens due to variation of salt concentration and/or pH, resulting in agglomeration.…”

Section: Preparation Of Antibody-immobilized Membranementioning

confidence: 84%

“…1821-090) was cut into a piece of 6 mm in diameter and applied hydrophilic treatment using UV/O 3 cleaner (made by Filgen, UV253E). On the other hand, the color change attributed to Cu 2+ can be explained as a consequence of its ability to oxidize Ag [14,15] since the standard potential in the existence of Cl − becomes AgCl + e − = Ag + Cl − +0.222V Cu 2+ + Cl − + e − = CuCl + 0.570V Furthermore, it was confirmed that the solution color changed in response to NaOH while the hydrogel color remained unchanged. It was cleaned and then soaked in 2.5 v/v% GA solution to introduce aldehyde groups.…”

Section: Preparation Of Antibody-immobilized Membranementioning

confidence: 99%

See 1 more Smart Citation

Development of Element Technology for 1 STEP Biomarker Protein Analysis Device Using Silver Nanoparticle–Contained Hydrogel and Reagent‐Immobilized Cartridge

Yamamoto

Sueyoshi

Hisamoto

et al. 2017

Elect Comm in Japan

View full text Add to dashboard Cite

We fabricated 1 STEP biomarker protein analysis device using silver nanoparticles (AgNPs)-contained hydrogel and reagent-immobilized cartridge. Specific color change of AgNPs based on localized surface plasmon resonance (LSPR) was applied to develop the novel colorimetric protein analysis device. In this report, we constructed this device by four components, AgNPs-contained hydrogel, glucose oxidase (GOx) antibody release pad, glucose release pad, and antibody-immobilized membrane. AgNPs-contained hydrogel detected 0.001 to 10 μg/mL GOx-antibody. AgNPs-contained hydrogel absorbance became altered 90.0% GOx release pad as compared to GOx-antibody solution under the reaction time 60 min. AgNPs-contained hydrogel absorbance became altered 98.4% glucose release pad as compared to glucose solution under the reaction time 60 min. We applied AgNPscontained hydrogel and antibody-immobilized membrane to detect human immunoglobulin G (IgG). As a result, we found these could detect 1 μg/mL or lower concentration of human IgG. C⃝ 2017 Wiley Periodicals, Inc. Electron Comm Jpn, 100(6): 45-53, 2017; Published online in Wiley Online Library (wileyonlinelibrary.com).

show abstract

Section: Preparation Of Antibody-immobilized Membranementioning

confidence: 84%

Section: Preparation Of Antibody-immobilized Membranementioning

confidence: 99%

Development of Element Technology for 1 STEP Biomarker Protein Analysis Device Using Silver Nanoparticle–Contained Hydrogel and Reagent‐Immobilized Cartridge

Yamamoto

Sueyoshi

Hisamoto

et al. 2017

Elect Comm in Japan

View full text Add to dashboard Cite

show abstract

“…Several examples can be found in the literature of the modulation of UV − visible absorption or photoluminescence of bulk gel optical properties induced by the incorporation of NPs. For instance, Jeevika and Shankaran developed a colorimetric Cu 2+ sensor using silver‐NP‐loaded gelatin hydrogels . The gelatin matrix offers a stable scaffold to prevent the aggregation of Ag NPs.…”

Section: Optical Propertiesmentioning

confidence: 99%

“…For instance, volume changes are more difficult to measure than colorimetric changes; therefore, by coupling a visual change to a volumetric one, the whole process is more readily detected or quantified. In the Optical properties section, a typical example was presented that involved polymers embedded with Au or Ag NPs, the colour of which depends on the interparticle distance; as a result, gel swelling and deswelling provides an easy handle towards colour changes …”

Section: Responsiveness To Stimulimentioning

confidence: 99%

Soft nanocomposites: nanoparticles to tune gel properties

Silva

Dreiss

2015

Polymer International

View full text Add to dashboard Cite

The demand for new, soft materials with bespoke physical and biological characteristics and functionality has fuelled the research into nanocomposite hydrogels. 'Soft' nanocomposites -nanoparticles within a hydrated, polymeric gel matrix -offer a simple, yet versatile, platform for the design of materials with specific -and tunable -properties. Indeed, the 'soft' properties of the matrix can be combined with the inherent functionality of the nanoparticles (drug loading, antimicrobial, light refraction etc.) or give rise to altogether new characteristics (toughness, optical properties, self-healing etc.) evolved from the synergistic interaction of the polymer chains with the particles. In this review, we report the evolution and achievements of nanocomposite gels, with a focus on mechanisms and structure. The review is therefore structured around the properties resulting from the gel/nanoparticle association, rather than a classification based on applications or specific types of polymer or nanoparticles. How can nanoparticles tune mechanical, optical, biological properties or impart stimuli-responsiveness to a polymer gel matrix − and how is this behaviour linked to the underlying structure?

show abstract

“…It has been confirmed that excess amounts of copper can cause Wilson’s, Alzheimer’s and prion diseases and inflammatory disorders. The WHO advised, in a guideline for drinking water, that the maximum permissible quantity of copper should be within 1.3 mg·L −1 [8,9]. …”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Silver Nanoparticles Stabilized with Mussel-Inspired Protein and Colorimetric Sensing of Lead(II) and Copper(II) Ions

Cheon

Park

2016

IJMS

View full text Add to dashboard Cite

This articles reports a simple and green method for preparing uniform silver nanoparticles (AgNPs), for which self-polymerized 3,4-dihydroxy-l-phenylalanine (polyDOPA) is used as the reducing and stabilizing agent in aqueous media. The AgNPs functionalized by polyDOPA were analyzed by UV–Vis spectroscopy, high-resolution transmission electron microscopy (HR-TEM), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), Raman spectrophotometry, and X-ray diffraction (XRD) techniques. The results revealed that the polyDOPA-AgNPs with diameters of 25 nm were well dispersed due to the polyDOPA. It was noted that the polyDOPA-AgNPs showed selectivity for Pb2+ and Cu2+ detection with the detection limits for the two ions as low as 9.4 × 10−5 and 8.1 × 10−5 μM, respectively. Therefore, the polyDOPA-AgNPs can be applied to both Pb2+ and Cu2+ detection in real water samples. The proposed method will be useful for colorimetric detection of heavy metal ions in aqueous media.

show abstract

Visual colorimetric sensing of copper ions based on reproducible gelatin functionalized silver nanoparticles and gelatin hydrogels

Cited by 39 publications

References 20 publications

Development of Element Technology for 1 STEP Biomarker Protein Analysis Device Using Silver Nanoparticle–Contained Hydrogel and Reagent‐Immobilized Cartridge

Development of Element Technology for 1 STEP Biomarker Protein Analysis Device Using Silver Nanoparticle–Contained Hydrogel and Reagent‐Immobilized Cartridge

Soft nanocomposites: nanoparticles to tune gel properties

Green Synthesis of Silver Nanoparticles Stabilized with Mussel-Inspired Protein and Colorimetric Sensing of Lead(II) and Copper(II) Ions

Contact Info

Product

Resources

About