Core@shell nanomaterials based sensing devices: A review

Kalambate, Pramod K.; Dhanjai,; Huang, Zhen; Li, Yankai; Shen, Yue; Xie, Meilan; Huang, Yunhui; Srivastava, Ashwini K.

doi:10.1016/j.trac.2019.04.002

Cited by 126 publications

(47 citation statements)

References 99 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Recently, core-shell nanostructures have been selected as excellent candidates for applications in various branches of nanotechnology, including biosensing [ 6 ], targeted therapies [ 7 ], and metal enhanced fluorescence (MEF) [ 8 ]. The inorganic-organic nanocomposites of core-shell types that absorb in an ultraviolet/visible range and emit in a visible spectral domain can be particularly useful for bio-imaging [ 9 ], sensors design [ 10 ], safe sun-screens [ 11 ], and modern, very efficient, and selective drug carriers [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Dansyl-Labelled Ag@SiO2 Core-Shell Nanostructures—Synthesis, Characterization, and Metal-Enhanced Fluorescence

et al. 2020

View full text Add to dashboard Cite

The present work describes synthesis, characterization, and use of a new dansyl-labelled Ag@SiO2 nanocomposite as an element of a new plasmonic platform to enhance the fluorescence intensity. Keeping in mind that typical surface plasmon resonance (SPR) characteristics of silver nanoparticles coincide well enough with the absorption of dansyl molecules, we used them to build the core of the nanocomposite. Moreover, we utilized 10 nm amino-functionalized silica shell as a separator between silver nanoparticles and the dansyl dye to prevent the dye-to-metal energy transfer. The dansyl group was incorporated into Ag@SiO2 core-shell nanostructures by the reaction of aminopropyltrimethoxysilane with dansyl chloride and we characterized the new dansyl-labelled Ag@SiO2 nanocomposite using transmission electron microscopy (TEM) and Fourier-transform infrared spectroscopy (FTIR). Additionally, water wettability measurements (WWM) were carried out to assess the hydrophobicity and hydrophilicity of the studied surface. We found that the nanocomposite deposited on a semitransparent silver mirror strongly increased the fluorescence intensity of dansyl dye (about 87-fold) compared with the control sample on the glass, proving that the system is a perfect candidate for a sensitive plasmonic platform.

show abstract

Section: Introductionmentioning

confidence: 99%

Dansyl-Labelled Ag@SiO2 Core-Shell Nanostructures—Synthesis, Characterization, and Metal-Enhanced Fluorescence

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The incorporation of functional nucleic acids, including aptamers into wearable and sentinel nanomaterial devices has seen the most progress in the medical realm. Several nanomaterial constructed wearable sensors have been recently reviewed (Yao et al, 2018;Kalambate et al, 2019). In particular, researchers have made progress in developing wearable sensors by using nanomaterials such as carbon nanotubes and nanotechnologies such as field-effect transistors to measure body temperature, monitor electrophysiology, measure mechanical strain, sense pressure and touch, detect biomarkers, and monitor environmental exposure.…”

Section: Incorporation Of Aptamers Into Wearable and Sentinel Devicesmentioning

confidence: 99%

Aptamer-Based Biosensors for Environmental Monitoring

2020

View full text Add to dashboard Cite

Due to their relative synthetic and chemical simplicity compared to antibodies, aptamers afford enhanced stability and functionality for the detection of environmental contaminants and for use in environmental monitoring. Furthermore, nucleic acid aptamers can be selected for toxic targets which may prove difficult for antibody development. Of particular relevance, aptamers have been selected and used to develop biosensors for environmental contaminants such as heavy metals, small-molecule agricultural toxins, and water-borne bacterial pathogens. This review will focus on recent aptamer-based developments for the detection of diverse environmental contaminants. Within this domain, aptamers have been combined with other technologies to develop biosensors with various signal outputs. The goal of much of this work is to develop cost-effective, user-friendly detection methods that can complement or replace traditional environmental monitoring strategies. This review will highlight recent examples in this area. Additionally, with innovative developments such as wearable devices, sentinel materials, and lab-on-a-chip designs, there exists significant potential for the development of multifunctional aptamer-based biosensors for environmental monitoring. Examples of these technologies will also be highlighted. Finally, a critical perspective on the field, and thoughts on future research directions will be offered.

show abstract

“…Актуальными являются исследования структур " ядро/оболочка" и " ядро/оболочка/оболочка" [29][30][31][32][33][34][35][36][37]. К перспективным относятся полимерные композиции, содержащие КТ и их структуры.…”

Section: Introductionunclassified

Фотолюминесценция квантовых точек (Zn, Pb, Mn)S в полиакрилатной матрице

Исаева¹,

Smagin²

2020

Физика И Техника Полупроводников

View full text Add to dashboard Cite

Solutions of quantum dots (Zn,Pb,Mn)S with different mole ratio of cations were obtained by colloidal synthesis in methyl methacrylate (MMA) medium. By thermal polymerization of MMA in the block, colloidal solutions are transferred to the glassy state. The optical transparency of PMMA/(Zn,Pb,Mn)S compositions at wavelengths >500 nm reaches 90% with the thickness of the absorbing layer up to 5 mm. Photoluminescence of compositions in the spectral region of 400–480 nm is associated with electron recombination at the levels of defects in the crystal structure of ZnS, in the range of 520–620 nm with 4T1 → 6A1 electron transition in Mn2+ ions. Excitation of photoluminescence occurs as a result of interband transitions in ZnS and energy transfer from the conduction band of ZnS to Mn2+ ion levels. The luminescence spectrum depends on the molar ratio of Mn2+ and Pb2+ ions, the sequence of introduction of the components into the reaction mixture, the wavelength of the exciting radiation.

show abstract

Core@shell nanomaterials based sensing devices: A review

Cited by 126 publications

References 99 publications

Dansyl-Labelled Ag@SiO2 Core-Shell Nanostructures—Synthesis, Characterization, and Metal-Enhanced Fluorescence

Dansyl-Labelled Ag@SiO2 Core-Shell Nanostructures—Synthesis, Characterization, and Metal-Enhanced Fluorescence

Aptamer-Based Biosensors for Environmental Monitoring

Фотолюминесценция квантовых точек (Zn, Pb, Mn)S в полиакрилатной матрице

Contact Info

Product

Resources

About