Au@pNIPAM Colloids as Molecular Traps for Surface-Enhanced, Spectroscopic, Ultra-Sensitive Analysis

Au@pNIPAM Colloids as Molecular Traps for Surface-Enhanced, Spectroscopic, Ultra-Sensitive Analysis

Caught in a trap: Colloids of gold nanoparticles coated with a thermally responsive poly‐(N‐isopropylacrylamide) (pNIPAM) microgel can trap molecules in different ways as a function of temperature (see scheme). The porous pNIPAM shells prevent electromagnetic coupling between metal particles, thus p...

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Veröffentlicht in:Angewandte Chemie (International ed.) 2009-01, Vol.48 (1), p.138-143
Hauptverfasser: Álvarez-Puebla, Ramon A, Contreras-Cáceres, Rafael, Pastoriza-Santos, Isabel, Pérez-Juste, Jorge, Liz-Marzán, Luis M
Format: Artikel
Sprache:eng
Schlagworte:
Acrylic Resins - chemistry
Colloids
gold
Gold - chemistry
Metal Nanoparticles - chemistry
Metal Nanoparticles - ultrastructure
Microscopy, Electron, Transmission
nanoparticles
sensing
Sensitivity and Specificity
SERS
Spectrophotometry - methods
Surface Properties
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Zusammenfassung:Caught in a trap: Colloids of gold nanoparticles coated with a thermally responsive poly‐(N‐isopropylacrylamide) (pNIPAM) microgel can trap molecules in different ways as a function of temperature (see scheme). The porous pNIPAM shells prevent electromagnetic coupling between metal particles, thus providing highly reproducible surface‐enhanced Raman scattering (SERS) signals and intensity.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.200804059