Quantum Dots as Templates for Self-Assembly of Photoswitchable Polymers: Small, Dual-Color Nanoparticles Capable of Facile Photomodulation
A photomodulatable amphiphilic polymer has been synthesized with a backbone of poly[isobutylene-alt-maleic anhydride] and pendant dodecyl alkyl chains, Lucifer Yellow (LY) fluorescent probes, and diheteroarylethenes photochromic (PC) groups. The latter serve as reversible UV-activated FRET acceptors...
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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2013
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/135509 |
| Aporte de: |
| id |
I19-R120-10915-135509 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Química Física polymers spectral properties switching properties |
| spellingShingle |
Química Física polymers spectral properties switching properties Díaz, Sebastián A. Giordano, Luciana Azcárate, Julio César Jovin, Thomas M. Jares-Erijman, Elizabeth A. Quantum Dots as Templates for Self-Assembly of Photoswitchable Polymers: Small, Dual-Color Nanoparticles Capable of Facile Photomodulation |
| topic_facet |
Química Física polymers spectral properties switching properties |
| description |
A photomodulatable amphiphilic polymer has been synthesized with a backbone of poly[isobutylene-alt-maleic anhydride] and pendant dodecyl alkyl chains, Lucifer Yellow (LY) fluorescent probes, and diheteroarylethenes photochromic (PC) groups. The latter serve as reversible UV-activated FRET acceptors for the LY donors. We characterized the spectral and switching properties of the polymer in an organic solvent (CHCl₃). In an aqueous medium the polymer forms polymersomes, constituting fluorescence probes ∼75 nm in diameter. Self-assembly of the polymer on the surface of a quantum dot (QD) serving as a template creates a dual-color photoswitchable nanoparticle (psNP) with improved properties due to the increase in polymer density and efficiency of PC photoconversion. The psNP exhibits a second QD red emission band that functions as an internal standard requiring only a single excitation wavelength, and is much reduced in size (<20 nm diameter) compared to the polymersomes. The QD template also greatly increases the depth of modulation by photochromic FRET of the LY emission monitored by both steady-state and time-resolved (lifetime) fluorescence (from 20%→70%, and from 12%→55%, respectively). |
| format |
Articulo Articulo |
| author |
Díaz, Sebastián A. Giordano, Luciana Azcárate, Julio César Jovin, Thomas M. Jares-Erijman, Elizabeth A. |
| author_facet |
Díaz, Sebastián A. Giordano, Luciana Azcárate, Julio César Jovin, Thomas M. Jares-Erijman, Elizabeth A. |
| author_sort |
Díaz, Sebastián A. |
| title |
Quantum Dots as Templates for Self-Assembly of Photoswitchable Polymers: Small, Dual-Color Nanoparticles Capable of Facile Photomodulation |
| title_short |
Quantum Dots as Templates for Self-Assembly of Photoswitchable Polymers: Small, Dual-Color Nanoparticles Capable of Facile Photomodulation |
| title_full |
Quantum Dots as Templates for Self-Assembly of Photoswitchable Polymers: Small, Dual-Color Nanoparticles Capable of Facile Photomodulation |
| title_fullStr |
Quantum Dots as Templates for Self-Assembly of Photoswitchable Polymers: Small, Dual-Color Nanoparticles Capable of Facile Photomodulation |
| title_full_unstemmed |
Quantum Dots as Templates for Self-Assembly of Photoswitchable Polymers: Small, Dual-Color Nanoparticles Capable of Facile Photomodulation |
| title_sort |
quantum dots as templates for self-assembly of photoswitchable polymers: small, dual-color nanoparticles capable of facile photomodulation |
| publishDate |
2013 |
| url |
http://sedici.unlp.edu.ar/handle/10915/135509 |
| work_keys_str_mv |
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Repositorios |
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