+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Low-Saturation-Intensity, High-Photostability, and High-Resolution STED Nanoscopy Assisted by CsPbBr 3 Quantum Dots



Low-Saturation-Intensity, High-Photostability, and High-Resolution STED Nanoscopy Assisted by CsPbBr 3 Quantum Dots



Advanced Materials 30(23): E1800167



Stimulated emission depletion (STED) nanoscopy is one of the most promising super-resolution imaging techniques for microstructure imaging. Commercial CdSe@ZnS quantum dots are used as STED probes and ≈50 nm lateral resolution is obtained. Compared with other quantum dots, perovskite CsPbBr3 nanoparticles (NPs) possess higher photoluminescence quantum yield and larger absorption cross-section, making them a more effective probe for STED nanoscopy. In this study, CsPbBr3 NPs are used as probes for STED nanoscopy imaging. The fluorescence intensity of the CsPbBr3 sample is hardly weakened at all after 200 min irradiation with a 39.8 mW depletion laser, indicating excellent photobleaching resistance of the CsPbBr3 NPs. The saturation intensity of the CsPbBr3 NPs is extremely low and estimated to be only 0.4 mW (0.126 MW cm-2 ). Finally, an ultrahigh lateral resolution of 20.6 nm is obtained for a single nanoparticle under 27.5 mW STED laser irradiation in CsPbBr3 -based STED nanoscopy imaging, which is a tenfold improvement compared with confocal microscopy. Because of its high fluorescence stability and ultrahigh resolution under lower depletion power, CsPbBr3 -assisted STED nanoscopy has great potential to investigate microstructures that require super-resolution and long-term imaging.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 065291338

Download citation: RISBibTeXText

PMID: 29687514

DOI: 10.1002/adma.201800167


Related references

Silica encapsulation of toluene soluble quantum dots with high photostability. Journal of Colloid and Interface Science 395: 45-49, 2013

Preparation of carbon quantum dots based high photostability luminescent membranes. Luminescence 32(4): 625-630, 2016

Large exciton binding energy, high photoluminescence quantum yield and improved photostability of organo-metal halide hybrid perovskite quantum dots grown on a mesoporous titanium dioxide template. Journal of Colloid and Interface Science 539: 619-633, 2019

Quantum dots laser desorption/ionization MS: multifunctional CdSe quantum dots as the matrix, concentrating probes and acceleration for microwave enzymatic digestion for peptide analysis and high resolution detection of proteins in a linear MALDI-TOF MS. Proteomics 9(10): 2656-2667, 2009

Amino-Assisted Anchoring of CsPbBr 3 Perovskite Quantum Dots on Porous g-C 3 N 4 for Enhanced Photocatalytic CO 2 Reduction. Angewandte Chemie 57(41): 13570-13574, 2018

Joint tagging assisted fluctuation nanoscopy enables fast high-density super-resolution imaging. Journal of Biophotonics 11(9): E201800020, 2018

High resolution STEM of quantum dots and quantum wires. Micron 44: 75-92, 2012

Double labeling and comparison of fluorescence intensity and photostability between quantum dots and FITC in oral tumors. Molecular Medicine Reports 4(3): 425-429, 2011

Achieving λ/10 resolution CW STED nanoscopy with a Ti:Sapphire oscillator. Plos One 7(6): E40003, 2013

Color tuning of indium phosphide quantum dots for cadmium-free quantum dot light-emitting devices with high efficiency and color saturation. Journal of the Society for Information Display 23(7): 285-293, 2015

Increasing fluorescence lifetime for resolution improvement in STED nanoscopy. Journal of Biophotonics 2018: E201800315, 2018

High resolution detection of high mass proteins up to 80,000 Da via multifunctional CdS quantum dots in laser desorption/ionization mass spectrometry. Talanta 83(1): 178-184, 2011

The use of heat transfer fluids in the synthesis of high-quality CdSe quantum dots, core/shell quantum dots, and quantum rods. Nanotechnology 16(10): 2000-2011, 2005

High-Resolution Bubble Printing of Quantum Dots. Acs Applied Materials and Interfaces 9(19): 16725-16733, 2017

High-Resolution Valley Spectroscopy of Si Quantum Dots. Physical Review Letters 119(17): 176803, 2017