A new strategy for synthesizing AgInS2 quantum dots emitting brightly in near-infrared window for in vivo imaging

Tan, Lianjiang; Liu, Shuiping; Li, Xiaoqiang; Chronakis, Ioannis S.; Shen, Yu‐Mei

doi:10.1016/j.colsurfb.2014.11.041

Cited by 46 publications

(27 citation statements)

References 35 publications

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“…2a exhibit that the as-prepared products (AgInS 2 QDs) are spherically monodisperse NPs that possess an average diameter of $7.4 nm through measuring 100 particles in TEM visual eld. 30 The crystal microstructure of AgInS 2 QDs was characterized by XRD. 2a).…”

Section: Synthesis and Characterizationmentioning

confidence: 99%

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Retracted Article: Facile fabrication of water-dispersible AgInS₂ quantum dots and mesoporous AgInS₂ nanospheres with visible photoluminescence

et al. 2015

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A facile one-step method for preparing water-dispersible carboxylic acid-terminated AgInS 2 quantum dots (QDs) with near-infrared (NIR) emission was developed. In the presence of polyethylenimine, the as-prepared AgInS 2 QDs gathered together to form QDs-self-assemblies, followed by centrifugating to obtain QDs aggregates. After that, the resulting QDs aggregates were calcined at elevated temperature to yield AgInS 2 nanospheres. Experimental results confirmed that the AgInS 2 nanospheres exhibited a mesoporous structure and consisted of repeated units of AgInS 2 QDs. The mesoporous AgInS 2 nanospheres had photoluminescence (PL) in the visible region that was different from that of the original AgInS 2 QDs emitted in the NIR region. High PL stability and low cytotoxicity of the nanospheres were verified experimentally. These results further revealed the potential of mesoporous AgInS 2 nanospheres for biomedical application, especially serving as novel nanoprobes for in vitro and in vivo PL imaging.

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Section: Synthesis and Characterizationmentioning

confidence: 99%

“…30 It utilized multidentate poly(acrylic acid)-gra-mercaptoethylamine polymers as the capping ligand and S-N 2 H 4 $H 2 O complex as the sulfur precursor. 30 It utilized multidentate poly(acrylic acid)-gra-mercaptoethylamine polymers as the capping ligand and S-N 2 H 4 $H 2 O complex as the sulfur precursor.…”

Section: Introductionmentioning

confidence: 99%

Retracted Article: Facile fabrication of water-dispersible AgInS₂ quantum dots and mesoporous AgInS₂ nanospheres with visible photoluminescence

et al. 2015

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“…The QY was calculated by the formula QY = N emit / N abs as described in the experimental section, where N emit stands for the emitted photons from the NCs and N abs for the absorbed photons by the NCs. The obtained QY value was higher than that of I‐III‐VI NCs in the literature at longer emission wavelength range …”

Section: Performance Of Sunlight and Transmitted Sunlight Through Lscscontrasting

confidence: 64%

“…In this work, to address the three key factors in applying NCs‐LSCs, such as “heavy metal free,” “low reabsorption,” and “NIR emission,” we have introduced another heavy metal free AgInS 2 /ZnS (AIS/ZnS) NCs with a core‐shell structure and an NIR emission to the LSC technique for the first time. The NCs have been successfully synthesized in mild reaction conditions .…”

Section: Performance Of Sunlight and Transmitted Sunlight Through Lscsmentioning

confidence: 99%

Heavy Metal Free Nanocrystals with Near Infrared Emission Applying in Luminescent Solar Concentrator

Chen

Liu

et al. 2017

Sol. RRL

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Low reabsorption, near infrared (NIR) emission, and heavy metal free are key trends for the nanocrystals (NCs) based luminescent solar concentrator (LSC). In this research, heavy metal free AgInS2/ZnS (AIS/ZnS) NCs have been synthesized and utilized by LSC technique with NIR emission for the first time. The AIS/ZnS demonstrated a tetragonal crystal phase and an NIR emission at 918 nm when the ratio of [Ag]:[In] = 1: 0.5 for metal elements in precursors. The quantum efficiency was also improved to 60.3% as the absolute quantum yield (QY) after inorganic surface passivation. Moreover, AIS/ZnS LSCs have been fabricated by in situ polymerization. Benefiting from low reabsorption by “large effective Stokes shift” and high emission efficiencies of the AIS/ZnS NCs, the optical power efficiency (OPE) of large area AIS/ZnS LSC reached to 3.94%, and interestingly, the LSC also revealed high color transmittance in the visible range, which could maintain high quality of the transmitted natural light with color rendering properties at above 97 for Ra, and correlated color temperature of around 4500 K. These NCs and related LSCs will play an important role in smart building integrated photovoltaics.

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“…After 80 min, QDs started to accumulate in the liver and spleen suggesting the onset of clearance. Similar NIR (817 nm) AgInS 2 ternary QDs were prepared by Tan et al without any active target design . The QD surface was modified with capping agent poly(acrylic acid)‐ graft ‐mercaptoethylamine (PAA‐ g ‐MEA), which has a multidentate molecular structure.…”

Section: Preclinical Quantum Dot Imaging In Cancermentioning

confidence: 99%

Biocompatible Semiconductor Quantum Dots as Cancer Imaging Agents

et al. 2018

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Approximately 1.7 million new cases of cancer will be diagnosed this year in the United States leading to 600 000 deaths. Patient survival rates are highly correlated with the stage of cancer diagnosis, with localized and regional remission rates that are much higher than for metastatic cancer. The current standard of care for many solid tumors includes imaging and biopsy with histological assessment. In many cases, after tomographical imaging modalities have identified abnormal morphology consistent with cancer, surgery is performed to remove the primary tumor and evaluate the surrounding lymph nodes. Accurate identification of tumor margins and staging are critical for selecting optimal treatments to minimize recurrence. Visible, fluorescent, and radiolabeled small molecules have been used as contrast agents to improve detection during real-time intraoperative imaging. Unfortunately, current dyes lack the tissue specificity, stability, and signal penetration needed for optimal performance. Quantum dots (QDs) represent an exciting class of fluorescent probes for optical imaging with tunable optical properties, high stability, and the ability to target tumors or lymph nodes based on surface functionalization. Here, state-of-the-art biocompatible QDs are compared with current Food and Drug Administration approved fluorophores used in cancer imaging and a perspective on the pathway to clinical translation is provided.

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A new strategy for synthesizing AgInS2 quantum dots emitting brightly in near-infrared window for in vivo imaging

Cited by 46 publications

References 35 publications

Retracted Article: Facile fabrication of water-dispersible AgInS₂ quantum dots and mesoporous AgInS₂ nanospheres with visible photoluminescence

Retracted Article: Facile fabrication of water-dispersible AgInS₂ quantum dots and mesoporous AgInS₂ nanospheres with visible photoluminescence

Heavy Metal Free Nanocrystals with Near Infrared Emission Applying in Luminescent Solar Concentrator

Biocompatible Semiconductor Quantum Dots as Cancer Imaging Agents

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A new strategy for synthesizing AgInS2 quantum dots emitting brightly in near-infrared window for in vivo imaging

Cited by 46 publications

References 35 publications

Retracted Article: Facile fabrication of water-dispersible AgInS2 quantum dots and mesoporous AgInS2 nanospheres with visible photoluminescence

Retracted Article: Facile fabrication of water-dispersible AgInS2 quantum dots and mesoporous AgInS2 nanospheres with visible photoluminescence

Heavy Metal Free Nanocrystals with Near Infrared Emission Applying in Luminescent Solar Concentrator

Biocompatible Semiconductor Quantum Dots as Cancer Imaging Agents

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Product

Resources

About

Retracted Article: Facile fabrication of water-dispersible AgInS₂ quantum dots and mesoporous AgInS₂ nanospheres with visible photoluminescence

Retracted Article: Facile fabrication of water-dispersible AgInS₂ quantum dots and mesoporous AgInS₂ nanospheres with visible photoluminescence