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Title: Photostable and efficient upconverting nanocrystal-based chemical sensors

Journal Article · · Optical Materials
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Columbia Univ., New York, NY (United States)

Chemical sensing in living systems demands optical sensors that are bright, stable, and sensitive to the rapid dynamics of chemical signaling. Lanthanide-doped upconverting nanoparticles (UCNPs) efficiently convert near infrared (NIR) light to higher energy emission and allow biological systems to be imaged with no measurable background or photobleaching, and with reduced scatter for subsurface experiments. Despite their advantages as imaging probes, UCNPs have little innate chemical sensing ability and require pairing with organic fluorophores to act as biosensors, although the design of stable UCNP-fluorophore hybrids with efficient upconverted energy transfer (UET) has remained a challenge. Here, we report Yb3+- and Er3+-doped UCNP-fluorophore conjugates with UET efficiencies up to 88%, and photostabilities 100-fold greater by UET excitation than those of the free fluorophores under direct excitation. Despite adding distance between Er3+ donors and organic acceptors, thin inert shells significantly enhance overall emission without compromising UET efficiency. This can be explained by the large increase in quantum yield of Er3+ donors at the core/shell interface and the large number of fluorophore acceptors at the surface. Sensors excited by UET show increases in photostability well beyond those reported for other methods for increasing the longevity of organic fluorophores, and those covalently attached to UCNP surface polymers show greater chemical stability than those directly coordinated to the nanocrystal surface. Furthermore by conjugating other fluorescent chemosensors to UCNPs, these hybrids may be extended to a series of NIR-responsive biosensors for quantifying the dynamic chemical populations critical for cell signaling.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1510755
Alternate ID(s):
OSTI ID: 1544891
Journal Information:
Optical Materials, Vol. 84, Issue C; ISSN 0925-3467
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 15 works
Citation information provided by
Web of Science

References (55)

Recognition- and Reactivity-Based Fluorescent Probes for Studying Transition Metal Signaling in Living Systems journal July 2015
New sensing mechanisms for design of fluorescent chemosensors emerging in recent years journal January 2011
A new generation of Ca2+ indicators with greatly improved fluorescence properties. journal March 1985
In vivo three-photon microscopy of subcortical structures within an intact mouse brain journal January 2013
Energy-Looping Nanoparticles: Harnessing Excited-State Absorption for Deep-Tissue Imaging journal September 2016
Ultra-stable organic fluorophores for single-molecule research journal January 2014
Engineering bright sub-10-nm upconverting nanocrystals for single-molecule imaging journal March 2014
Enrichment of molecular antenna triplets amplifies upconverting nanoparticle emission journal April 2018
Long-Term Real-Time Tracking of Lanthanide Ion Doped Upconverting Nanoparticles in Living Cells journal May 2011
Non-blinking and photostable upconverted luminescence from single lanthanide-doped nanocrystals journal June 2009
Explaining the Nanoscale Effect in the Upconversion Dynamics of β-NaYF 4 :Yb 3+ , Er 3+ Core and Core–Shell Nanocrystals journal July 2017
Direct Evidence for Coupled Surface and Concentration Quenching Dynamics in Lanthanide-Doped Nanocrystals journal February 2017
Tuning upconversion through energy migration in core–shell nanoparticles journal October 2011
Enhancing Multiphoton Upconversion from NaYF 4 :Yb/Tm@NaYF 4 Core–Shell Nanoparticles via the Use of Laser Cavity journal January 2017
Synthesis of 10 nm β-NaYF 4 :Yb,Er/NaYF 4 Core/Shell Upconversion Nanocrystals with 5 nm Particle Cores journal December 2015
Analysis of the Shell Thickness Distribution on NaYF 4 /NaGdF 4 Core/Shell Nanocrystals by EELS and EDS journal January 2011
Far-field optical nanothermometry using individual sub-50 nm upconverting nanoparticles journal January 2016
Photon upconverting nanoparticles for luminescent sensing of temperature journal January 2012
Upconverting Nanoparticles as Optical Sensors of Nano- to Micro-Newton Forces journal June 2017
Dendritic upconverting nanoparticles enable in vivo multiphoton microscopy with low-power continuous wave sources journal December 2012
Construction of LRET-Based Nanoprobe Using Upconversion Nanoparticles with Confined Emitters and Bared Surface as Luminophore journal March 2015
High-Efficiency Upconversion Luminescent Sensing and Bioimaging of Hg(II) by Chromophoric Ruthenium Complex-Assembled Nanophosphors journal September 2011
A Cyanine-Modified Nanosystem for in Vivo Upconversion Luminescence Bioimaging of Methylmercury journal June 2013
High-Efficiency in Vitro and in Vivo Detection of Zn 2+ by Dye-Assembled Upconversion Nanoparticles journal February 2015
Photon upconversion sensitized nanoprobes for sensing and imaging of pH journal January 2014
Multicolor In Vivo Imaging of Upconversion Nanoparticles with Emissions Tuned by Luminescence Resonance Energy Transfer journal January 2011
Particle-Size-Dependent Förster Resonance Energy Transfer from Upconversion Nanoparticles to Organic Dyes journal April 2017
Design of a Highly Sensitive and Specific Nucleotide Sensor Based on Photon Upconverting Particles journal September 2006
Engineered Upconversion Nanoparticles for Resolving Protein Interactions inside Living Cells journal August 2016
Critical Shell Thickness of Core/Shell Upconversion Luminescence Nanoplatform for FRET Application journal August 2011
Controlled Synthesis and Single-Particle Imaging of Bright, Sub-10 nm Lanthanide-Doped Upconverting Nanocrystals journal February 2012
Successive Layer-by-Layer Strategy for Multi-Shell Epitaxial Growth: Shell Thickness and Doping Position Dependence in Upconverting Optical Properties journal December 2012
Covalent Protein Labeling and Improved Single-Molecule Optical Properties of Aqueous CdSe/CdS Quantum Dots journal June 2017
Synthesis of Ligand-Free Colloidally Stable Water Dispersible Brightly Luminescent Lanthanide-Doped Upconverting Nanoparticles journal February 2011
Improved monomeric red, orange and yellow fluorescent proteins derived from Discosoma sp. red fluorescent protein journal November 2004
Hydrophobic Nanocrystals Coated with an Amphiphilic Polymer Shell:  A General Route to Water Soluble Nanocrystals journal April 2004
Hydrocyanines: A Class of Fluorescent Sensors That Can Image Reactive Oxygen Species in Cell Culture, Tissue, and In Vivo journal January 2009
Dual-Emitting Quantum Dot/Quantum Rod-Based Nanothermometers with Enhanced Response and Sensitivity in Live Cells journal June 2012
An Oxygen Scavenging System for Improvement of Dye Stability in Single-Molecule Fluorescence Experiments journal March 2008
Enhanced photostability of cyanine fluorophores across the visible spectrum journal April 2012
Photobleaching Pathways in Single-Molecule FRET Experiments journal April 2007
Photobleaching in Two-Photon Excitation Microscopy journal April 2000
Bright and Stable Core−Shell Fluorescent Silica Nanoparticles journal January 2005
Room-Temperature Fluorescence Imaging and Spectroscopy of Single Molecules by Two-Photon Excitation journal September 1997
A novel fluorophore for two-photon-excited single-molecule fluorescence journal November 2005
Novel Fluorophores for Single-Molecule Imaging journal February 2003
Analysis of Photobleaching in Single-Molecule Multicolor Excitation and Förster Resonance Energy Transfer Measurements journal February 2006
Combinatorial Discovery of Lanthanide-Doped Nanocrystals with Spectrally Pure Upconverted Emission journal June 2012
Precisely Tailoring Upconversion Dynamics via Energy Migration in Core-Shell Nanostructures journal February 2018
J-Aggregates: From Serendipitous Discovery to Supramolecular Engineering of Functional Dye Materials journal March 2011
Dependence of FRET efficiency on distance in single donor-acceptor pairs journal March 2015
Engineering Homogeneous Doping in Single Nanoparticle To Enhance Upconversion Efficiency journal May 2014
A Flexible Approach to the Calculation of Resonance Energy Transfer Efficiency between Multiple Donors and Acceptors in Complex Geometries journal December 2005
Strength in Numbers: Effects of Acceptor Abundance on FRET Efficiency journal October 2010
Absolute quantum yield measurements of colloidal NaYF4: Er3+, Yb3+ upconverting nanoparticles journal January 2010

Cited By (3)

Ultralow-threshold, continuous-wave upconverting lasing from subwavelength plasmons journal September 2019
In vivo deep-tissue microscopy with UCNP/Janus-dendrimers as imaging probes: resolution at depth and feasibility of ratiometric sensing journal January 2020
Optically Robust and Biocompatible Mechanosensitive Upconverting Nanoparticles journal July 2019