Synthesis and dual-channel optical properties of Mn-doped ZnSe quantum dots

Yu, Ji Soo; Kim, Sung Hun; Man, Minh Tan; Lee, Hong Seok

doi:10.1016/j.matlet.2019.07.005

Cited by 14 publications

(5 citation statements)

References 21 publications

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“…Moreover, in some cases, it also extends potential uses as components in a diverse range of ultrasensitive chemical/biological sensors. Compared with the fluorescence dyes and the quantum dots, , which have to be excited by strong lasers and usually suffer from photobleaching, these metallic NHs can be easily used as an optical bioprobe for long-term tracking of the interactions between cell and cell, as well as cell and biomolecule/medicine under white light using dark-field microscopy. This also avoids the phototoxicity to the living cells. − These metallic NHs are easily conjugated with biomolecules and medicines using our invented amino-silane combined DSS coupling reaction methods, which result in the markedly enhanced stability comparing to those of the traditional dye-based probes or quantum dots excited by lasers at certain wavelengths that are usually harmful to living cells under direct long-term irradiation.…”

Section: Resultsmentioning

confidence: 99%

Section: ■ Experimental Sectionmentioning

confidence: 99%

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Microfluidic Synthesis of Multimode Au@CoFeB-Rg3 Nanomedicines and Their Cytotoxicity and Anti-Tumor Effects

et al. 2020

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were developed by conjugating multimode nanohybrids with active ingredients of natural herbs using Au@CoFeB nanoparticles as one model of multimode nanohybrids and the ginsenoside Rg3 as one model of active ingredients of natural herbs. Au@CoFeB nanoparticles were first synthesized using a temperatureprogrammed microfluidics process. Then, the surface of Au@ CoFeB nanoparticles was modified via an amino-silane coupling agent of (3-aminopropyl) trimethoxysilane (APTMS) and then activated by the bifunctional amine-active cross-linker. They were thereafter conjugated to ginsenosides preactivated by APTMS by cross-linking the surface-activated nanohybrids, forming Au@ CoFeB-Rg3 nanomedicines. Their multimode imaging functions were evaluated with the characterization of their magnetic and optical properties and the response to X-ray radiation. They can be optically detected via dark-field microscopy and can be imaged through X-ray computed tomography. They can also be used as magnetic resonance imaging contrast agents with excellent T2-weighted spin−echo imaging effects. Au@CoFeB-Rg3 nanomedicines exhibited distinct cytotoxicity and inhibitory effects on the proliferation of human hepatocellular carcinoma cells (HepG2/C3) and human chronic myeloid leukemia cells (K562) but were less toxic to 3T3 cells than other cells at concentrations more than 200 μg/ mL. However, Au@CoFeB nanoparticles showed markedly lower cytotoxicity and inhibitory effects on the proliferation of these cell lines, particularly at concentrations <100 μg/mL, than Au@CoFeB-Rg3 nanomedicines. Clearly, there is a distinct synergistic effect between nanohybrids and Rg3. Additionally, Au@CoFeB nanohybrids showed almost no toxicity to Jurkat-CT cells at low concentrations (47 μg/mL), indicating that they may be used as multimode nanoprobes at a suitable concentration. These findings provide an efficient alternative for the synthesis of multifunctional antitumor nanomedicines based on multimode nanohybrids and active ingredients of natural resources.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Experimental Sectionmentioning

confidence: 99%

Microfluidic Synthesis of Multimode Au@CoFeB-Rg3 Nanomedicines and Their Cytotoxicity and Anti-Tumor Effects

et al. 2020

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“…ZnSe QDs can be used as matrices for doping, for modification of physicochemical properties. ZnSe-Al QDs can be promising materials for the development of spectrometric and counting alpha and alpha-beta detectors with high sensitivity and registration efficiency [16] Copper-doped In/ZnSe QDs are used as environmentally friendly fluorescent solar concentrators with high performance [17]. Doping with manganese (ZnSe-Mn) makes it possible to increase the photoluminescence lifetime in transition 4 T 1 → 6 A 1 in the range of 500-700 nm [18].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the temperature and precursors concentration dependence of the formation of ZnSe quantum dots

Alibay

Ахметова

et al. 2022

Eurasian j. phys. funct. mater.

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Various variations of the synthesis of ZnSe quantum dots are investigated. The influence of temperature, the concentration of precursors and the time of synthesis of quantum dots was taken into account. Aliquot absorption spectra is measured for various time intervals and the dynamics of the growth of ZnSe quantum dots is estimated. Luminescence and absorption spectra were obtained for purified quantum dots. Based on the experimental data, the nucleation time of quantum dots, optimal methods of synthesis and growth control is determent. HRTEM images showed the average size of ZnSe quantum dot, the calculated band gap is 2.84 eV.

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“…The unique attributes of QDs have attracted considerable attention for photonics applications such as solid-state lighting, photovoltaics, and bioimaging [3][4][5][6]. Tuning the size, shape, composition, and structure of QDs can alter the wavelengths of optical light absorption and photoluminescence (PL) and control the location of electronic charge carriers [7][8][9]. The key factor for success in these applications is the surface characteristics of the QDs, which become more important with decreasing size and can affect some properties on the nanoscale.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Optical Properties in CdSe Quantum Dots Using Z-type Ligands

Kim

Lee

2022

Appl. Sci. Converg. Technol.

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We passivated the surfaces of CdSe quantum dots (QDs) with Z-type ligands and demonstrated enhanced emission from the QDs. We studied the effects of the ligands on the quality of the QDs and the presence of cadmium halide complexes in the CdSe QDs functionalized with carboxylic and phosphine ligands. The photoluminescence (PL) intensity of the CdSe QDs treated with Z-type ligands at 40 ∘ C for 15 min was enhanced by ~2 times compared to that of pristine CdSe QDs because of surface defect passivation. By contrast, the PL intensity of CdSe QDs treated without Z-type ligands at 40 ∘ C for 15 min decreased by ~20 % compared to that of pristine CdSe QDs because of induced surface defects. The slight changes in the PL peak position and full width at half-maximum of the CdSe QDs passivated with Z-type ligands at different temperatures can be attributed to the modification of surface properties. In addition, the slight red shift in the PL peak position of the CdSe QDs treated without ligands at 40 ∘ C for 15 min is attributed to increased QD size.

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Synthesis and dual-channel optical properties of Mn-doped ZnSe quantum dots

Cited by 14 publications

References 21 publications

Microfluidic Synthesis of Multimode Au@CoFeB-Rg3 Nanomedicines and Their Cytotoxicity and Anti-Tumor Effects

Microfluidic Synthesis of Multimode Au@CoFeB-Rg3 Nanomedicines and Their Cytotoxicity and Anti-Tumor Effects

Investigation of the temperature and precursors concentration dependence of the formation of ZnSe quantum dots

Enhancement of Optical Properties in CdSe Quantum Dots Using Z-type Ligands

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