Carcinogenic Chromium (VI) Sensing Using Transducing Characteristics of Fiber Bragg Grating and Physical Swelling of Hydrogel

Pratima, B. M.; Kishore, Putha; Ashok, J.; Satyanarayana, M.; Reddy, P. Krishna; Rao, N. Rajeswara; Lakshmi, D.

doi:10.1007/s11220-022-00396-0

Cited by 6 publications

(5 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CrO 4 2– ions, one of the common forms of Cr(VI) in water, is used as the typical analyte. When CrO 4 2– ions appear in the water flow, the tetra-alkylammonium groups in hydrogel gratings can specifically recognize and capture CrO 4 2– ions to form 1:2 complexes. − Due to the complexation and the decreased charge density inside the hydrogel networks, the hydrogel gratings exhibit a decreased volume in proportion to the concentration of CrO 4 2– ([CrO 4 2– ]). By chemically fixing the hydrogel gratings on the glass slide, the hydrogel shrinkage only induces a decrease of height ( H ) of the nanoridges.…”

Section: Resultsmentioning

confidence: 99%

“…Although such a detection can be achieved by using conventional methods such as atomic absorption spectroscopy , and inductively coupled plasma–mass spectrometry, , they are still limited by the requirements of expensive bulky instruments, professional operators, and time-consuming operation protocols. Meanwhile, emerging techniques, such as microcantilever sensors, surface plasmon resonance-based fiber optic sensors, and fiber Bragg gratings, − are developed to advance the sensitive detection of Cr(VI). However, these techniques usually still require a relatively long response time ( e.g.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Highly Sensitive Hydrogel Gratings for Real-Time Detection of Trace Hexavalent Chromium Ions in Water

Tian

Zhang

Wen

et al. 2023

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

A smart hydrogel grating detector with ultra-sensitivity and high selectivity is developed for real-time detection of trace hexavalent chromium ions [Cr(VI)] in water in a continuous-flow manner. The proposed hydrogel gratings possess poly(acrylamide-co-3-acrylamidopropyl-trimethylammonium chloride) networks cross-linked by tetra-arm star poly(ethylene glycol)acrylamide (4-PEGAAm). In the hydrogel gratings, the tetra-alkylammonium groups in the polymeric networks of the hydrogel grating can specifically capture Cr(VI) via formation of ion pairs, while the 4-PEGAAm cross-linkers offer hydrogel grating with good transparency and mechanical properties. With rationally designed molecular structures and surface relief microstructures, the hydrogel grating detector enables highly selective detection of Cr(VI) from dozens of interfering ions in water with an ultralow detection limit (10–9 M) and fast response (<2 min). The smart hydrogel grating detector provides a promising detection platform for analytic science.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Hydrogel Gratings for Real-Time Detection of Trace Hexavalent Chromium Ions in Water

Tian

Zhang

Wen

et al. 2023

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…While (-e) shows electron charge. Fermi-Dirac distribution is presented like this [51][52][53][54][55][56][57][58][59][60][61]:…”

Section: Graphene Conductivitymentioning

confidence: 99%

Implementation of a Graphene-Based RGW Coupler for THz Applications

Kiani

Hamedani

Rezaei

2023

Preprint

View full text Add to dashboard Cite

Ridge gap waveguide is one of the new technologies in the field of waveguides. Their advantages include being planar, low cost of construction, shielding by metal without the need for problems related to packaging, the formation of a narrow gap enclosed between two metal plates, realization of the texture on one of the metal plates and lower losses. These structures have no mechanical connection. While electric currents must flow in them. In this article, two graphene-based ridge gap waveguide coupler structures are presented. The designed structures are used in the THz band. By using graphene in the THz frequency band, frequency reconfigurable can be achieved. S-parameters curves, phase difference diagrams and e-field distributions are reported for two graphene-based ridge gap waveguide couplers.

show abstract

“…1,2 Especially, stimuli-responsive hydrogels (e.g., photonic crystal hydrogels [3][4][5] and fluorescent hydrogels [6][7][8] ) are widely used in the field of visual detection, such as sensors for glucose, 9 organic solvents and compounds, [10][11][12] metal ions. [13][14][15] Photonic crystal hydrogels combine the unique structural colors of photonic crystals with the stimuli-responsiveness of hydrogels, because hydrogels can memorize or immobilize the periodic structure of photonic crystals. The volume change of photonic crystal hydrogels can cause the lattice spacing of photonic crystals to change accordingly, which results in a change of structural color of photonic crystal hydrogels.…”

Section: Introductionmentioning

confidence: 99%

“…Photonic crystal materials have attracted widely attention owing to brilliant structural color through Bragg diffraction 1,2 . Especially, stimuli‐responsive hydrogels (e.g., photonic crystal hydrogels 3–5 and fluorescent hydrogels 6–8 ) are widely used in the field of visual detection, such as sensors for glucose, 9 organic solvents and compounds, 10–12 metal ions 13–15 . Photonic crystal hydrogels combine the unique structural colors of photonic crystals with the stimuli‐responsiveness of hydrogels, because hydrogels can memorize or immobilize the periodic structure of photonic crystals.…”

Section: Introductionmentioning

confidence: 99%

Opal photonic crystal double‐network hydrogel for visual detection through structural color and fluorescent responsiveness

Lv,

Zheng,

Wang

et al. 2024

J of Applied Polymer Sci

View full text Add to dashboard Cite

Photonic crystal hydrogels are widely used in the field of visual detection, based on the response of the structural color to external stimulus, such as pH, temperature, near‐infrared light, and so on. Here, we develop an opal photonic crystal hydrogel by combining polystyrene (PS) photonic crystals with a fluorescent double‐network hydrogel and focus on both its visual detection function and mechanical property. The opal hydrogel is composed of nanocomposite hydrogel as the first network and ionic crosslinked hydrogel as the second network. The introduction of PS photonic crystals and terbium ions endows the opal hydrogel distinctive structural colors and fluorescence, respectively. Because of volume changes, the structural color of the opal hydrogel selectively responses to metal ions and organic solvents. Attributing to the ion exchange interaction, the opal hydrogel exhibits fluorescent responses to various metal ions. Combining the responsiveness of structural color and fluorescence, a visual dual‐detection mode is set up, with better detection sensitivity and selectivity. Moreover, the characteristics of nanocomposite and double‐network crosslinking ensure the opal hydrogel enough mechanical properties to undergo cycle visual detection. Consequently, the fabricated opal hydrogel is promising for use in visual detection to multiple substances in single‐ or dual‐detection mode.

show abstract

Carcinogenic Chromium (VI) Sensing Using Transducing Characteristics of Fiber Bragg Grating and Physical Swelling of Hydrogel

Cited by 6 publications

References 33 publications

Highly Sensitive Hydrogel Gratings for Real-Time Detection of Trace Hexavalent Chromium Ions in Water

Highly Sensitive Hydrogel Gratings for Real-Time Detection of Trace Hexavalent Chromium Ions in Water

Implementation of a Graphene-Based RGW Coupler for THz Applications

Opal photonic crystal double‐network hydrogel for visual detection through structural color and fluorescent responsiveness

Contact Info

Product

Resources

About