Synthesis, Properties and Bioimaging Applications of Silver-Based Quantum Dots

Borovaya, M.N.; Goriunova, I. I.; Plokhovska, Svitlana; Pushkarova, N. O.; Blume, Ya. B.; Yemets, А. І.

doi:10.3390/ijms222212202

Cited by 30 publications

(11 citation statements)

References 93 publications

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“…“Quantum dots (QDs)”, conjugated with high-fluorescence probes, are essential for detection and long-term fluorescence imaging of some kinds of cellular processes [ 26 , 27 ]. QD is one of the most promising immunochromatography markers.…”

Section: Quantum Dots (Qds)mentioning

confidence: 99%

New Advances in Lateral Flow Immunoassay (LFI) Technology for Food Safety Detection

Xing

Sun

et al. 2022

Molecules

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With the continuous development of China’s economy and society, people and the government have higher and higher requirements for food safety. Testing for food dopants and toxins can prevent the occurrence of various adverse health phenomena in the world’s population. By deploying new and powerful sensors that enable rapid sensing processes, the food industry can help detect trace adulteration and toxic substances. At present, as a common food safety detection method, lateral flow immunochromatography (LFI) is widely used in food safety testing, environmental testing and clinical medical treatment because of its advantages of simplicity, speed, specificity and low cost, and plays a pivotal role in ensuring food safety. This paper mainly focuses on the application of lateral flow immunochromatography and new technologies combined with test strips in food safety detection, such as aptamers, surface-enhanced Raman spectroscopy, quantum dots, electrochemical test strip detection technology, biosensor test strip detection, etc. In addition, sensing principles such as fluorescence resonance energy transfer can also more effective. Different methods have different characteristics. The following is a review of the application of these technologies in food safety detection.

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Section: Quantum Dots (Qds)mentioning

confidence: 99%

New Advances in Lateral Flow Immunoassay (LFI) Technology for Food Safety Detection

Xing

Sun

et al. 2022

Molecules

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“…Commonly used QDs are either prepared by using Cd, Pb, Cu and other elements with high environmental toxicity, or at high temperatures (more than 100 °C) with the use of toxic organic solvents, which limits their practical application. The synthesis of QDs has evolved toward the use of safer alternatives, such as Ag(I), Cu(I), and carbon dots [ 193 , 194 , 195 ]. The process of functionalizing QDs is not only complex and time-consuming, but also unsatisfactory in stability.…”

Section: Dna/rna Based Metamaterialsmentioning

confidence: 99%

Biomolecule-Based Optical Metamaterials: Design and Applications

et al. 2022

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Metamaterials are broadly defined as artificial, electromagnetically homogeneous structures that exhibit unusual physical properties that are not present in nature. They possess extraordinary capabilities to bend electromagnetic waves. Their size, shape and composition can be engineered to modify their characteristics, such as iridescence, color shift, absorbance at different wavelengths, etc., and harness them as biosensors. Metamaterial construction from biological sources such as carbohydrates, proteins and nucleic acids represents a low-cost alternative, rendering high quantities and yields. In addition, the malleability of these biomaterials makes it possible to fabricate an endless number of structured materials such as composited nanoparticles, biofilms, nanofibers, quantum dots, and many others, with very specific, invaluable and tremendously useful optical characteristics. The intrinsic characteristics observed in biomaterials make them suitable for biomedical applications. This review addresses the optical characteristics of metamaterials obtained from the major macromolecules found in nature: carbohydrates, proteins and DNA, highlighting their biosensor field use, and pointing out their physical properties and production paths.

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“…The NIR spectral region used for biological imaging is segmented into the NIR-I (λ = 700–950 nm), NIR-IIa (λ = 1000–1350 nm) and NIR-IIb (λ = 1500–1800 nm) biological windows. There are four classes of Cd–, Pb– and Hg–free colloidal QDs emitting the red-to-NIR light that include Group IV (C, Si, Ge, Ge 1-x Sn x alloy, and SiGeSn alloy) 6 – 14 , Group III-V (InN, InP, InSb, InAs and InAsSb alloy) 15 – 22 , Group I-VI (Ag 2 S, Ag 2 Se and Ag 2 Te) 23 – 28 and Group I-III-VI (CuInS 2 , CuInSe 2 , AgInSe 2 and ZnS-AgInS 2 ) 29 – 33 semiconductors. Other way for emerging red-to-NIR emission is the use of rare-earth doped nanocrystals 34 – 36 , or Pb-free perovskite nanocrystals such as CeSnI 3 , Sb-doped Cs 2 SnCl 4 Br 2 , and lanthanide-doped CsMnBr 3 37 – 40 .…”

Section: Introductionmentioning

confidence: 99%

Effect of the surface coverage of an alkyl carboxylic acid monolayer on waterborne and cellular uptake behaviors for silicon quantum dots

Shirahata

2022

Sci Rep

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This article reports the development of highly waterborne silicon quantum dots (Si QDs) terminated with a reactive group for grafting of biomolecules. Hydrogen-terminated QDs were prepared by thermal disproportionation of amorphous hydrogen silsesquioxane derived from triethoxysilane followed by hydrofluoric etching. Next, the hydrogenated Si surfaces were exposed to 10-undecenoic acid at different temperatures in Ar atmosphere, yielding the termination of the QDs with a carboxyl group. The thermal hydrosilylation of 10-undecenoic acid yielded the termination of the QDs with a carboxyl group. An increase in molecular coverage of an undecanoic acid (UA) monolayer resulted in both the enhanced increase of zeta-potential in a negative direction for a greater water-dispersity and the increase of absolute quantum yield (QY) of photoluminescence (PL). PLQY improved for ~ 1% to 26% with increasing UA coverage. We assessed the molecular interaction between the UA-SiQDs and HeLa cells by means of cellular uptake experiments using the QDs with different UA coverages. Results showed that the QDs with the highest dispersity in water were not internalized in the cells under confocal fluorescence microscopic observation. In contrast, the QDs with lower coverage of UA monolayer were internalized by endocytosis when incubated with HeLa cells. This contrasting observation opens the possibility of successfully preparing carboxy-capped SiQDs that do not allow cellular uptake but are targeted to specific cells by appropriate conjugation with biomolecules.

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Synthesis, Properties and Bioimaging Applications of Silver-Based Quantum Dots

Cited by 30 publications

References 93 publications

New Advances in Lateral Flow Immunoassay (LFI) Technology for Food Safety Detection

New Advances in Lateral Flow Immunoassay (LFI) Technology for Food Safety Detection

Biomolecule-Based Optical Metamaterials: Design and Applications

Effect of the surface coverage of an alkyl carboxylic acid monolayer on waterborne and cellular uptake behaviors for silicon quantum dots

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