Details:

Alternative Title:
Angew Chem Int Ed Engl
Publisher's site:
http://dx.doi.org/10.1002/anie.201408219
Personal Author:
Lai, Jinping ; Zhang, Yixiao ; Pasquale, Nicholas ; Lee, Ki-Bum
Lai, Jinping ; Zhang, Yixiao ; Pasquale, Nicholas ; Lee, Ki-Bum Less -
Description:
Developing multicolor upconversion nanoparticles (UCNPs) with the capability of regulating their emission wavelengths in the UV to visible range in response to external stimuli can offer more dynamic platforms for applications in high-resolution bioimaging, multicolor barcoding, and driving multiple important photochemical reactions, such as photoswitching. Here, we have rationally designed single-crystal core-shell-structured UCNPs which are capable of orthogonal UV and visible emissions in response to two distinct NIR excitations at 808 and 980 nm. The orthogonal excitation-emission properties of such UCNPs, as well as their ability to utilize low-power excitation, which attenuates any local heating from the lasers, endows the UCNPs with great potential for applications in materials and biological settings. As a proof of concept, the use of this UCNP for the efficient regulation of the two-way photoswitching of spiropyran by using dual wavelengths of NIR irradiation has been demonstrated.
Subject:
[+]
Article
Core-shell Nanoparticles
Dual NIR Excitations
Infrared Rays
Lasers
Luminescent Measurements
Nanoparticles
Pyrans
Spiro Compounds
Two-way Photoswitching
Upconversion Nanoparticles

Source:
Angew Chem Int Ed Engl. 53(52):14419-14423.
Pubmed ID:
25349100
Pubmed Central ID:
PMC4438079
Document Type:
Journal Article
Funding:
1DP20D006462-01/DP/NCCDPHP CDC HHS/United States ; 1R21NS085569-01/NS/NINDS NIH HHS/United States ; DP2 OD006462/OD/NIH HHS/United States ; R21 NS085569/NS/NINDS NIH HHS/United States
1DP20D006462-01/DP/NCCDPHP CDC HHS/United States ; 1R21NS085569-01/NS/NINDS NIH HHS/United States ; DP2 OD006462/OD/NIH HHS/United States ; R21 NS085569/NS/NINDS NIH HHS/United States Less -
Collection(s):
CDC Public Access
Main Document Checksum:
[+]
urn:sha256:fc1d14826d0bb1a4a8411477847755954bab00f6fcfa854f3de847cbfd478bc8
File Type:

Supporting Files

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