TY - JOUR
T1 - Engineering thermoresponsive polymeric nanoshells
AU - Cohn, Daniel
AU - Sagiv, Hagit
AU - Benyamin, Alexandra
AU - Lando, Gilad
PY - 2009/7
Y1 - 2009/7
N2 - This study describes a family of hollow nanoscale constructs able to display a large and reversible change in size, within a narrow temperature interval. These thermoresponsive nanostructures are generated by crosslinking functionalized amphiphilic molecules, such as poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) triblocks, while constrained to their particular micellar configuration. This contribution focuses on the generation of these supramolecular architectures, by intra-micellarly crosslinking PEO-PPO-PEO dimethacrylate amphiphiles, and investigates their temperature-dependent dimensional behavior. Spherical nanoshells displaying a 200 nm diameter at 15 °C, shrink sharply around 28 °C, generating a compact structure of approximately 40 nm at body temperature. Thermoresponsive nanotubes were created by generating them from rod-like micelles at higher temperatures. By varying the composition of the triblock, the transition temperature can be fine tuned, from around 25 °C to slightly above body temperature. Also, the nanoshells were rendered biodegradable by incorporating aliphatic oligoesters into their structure. Numerous applications for these nanostructures are foreseen in various biomedical areas, such as in drug and gene delivery, in the tissue engineering and in the biosensors field.
AB - This study describes a family of hollow nanoscale constructs able to display a large and reversible change in size, within a narrow temperature interval. These thermoresponsive nanostructures are generated by crosslinking functionalized amphiphilic molecules, such as poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) triblocks, while constrained to their particular micellar configuration. This contribution focuses on the generation of these supramolecular architectures, by intra-micellarly crosslinking PEO-PPO-PEO dimethacrylate amphiphiles, and investigates their temperature-dependent dimensional behavior. Spherical nanoshells displaying a 200 nm diameter at 15 °C, shrink sharply around 28 °C, generating a compact structure of approximately 40 nm at body temperature. Thermoresponsive nanotubes were created by generating them from rod-like micelles at higher temperatures. By varying the composition of the triblock, the transition temperature can be fine tuned, from around 25 °C to slightly above body temperature. Also, the nanoshells were rendered biodegradable by incorporating aliphatic oligoesters into their structure. Numerous applications for these nanostructures are foreseen in various biomedical areas, such as in drug and gene delivery, in the tissue engineering and in the biosensors field.
KW - Crosslinking
KW - Degradation
KW - Nanoparticle
KW - Pluronics
KW - Thermoresponsive polymer
UR - http://www.scopus.com/inward/record.url?scp=67349186870&partnerID=8YFLogxK
U2 - 10.1016/j.biomaterials.2009.02.026
DO - 10.1016/j.biomaterials.2009.02.026
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C2 - 19285720
AN - SCOPUS:67349186870
SN - 0142-9612
VL - 30
SP - 3289
EP - 3296
JO - Biomaterials
JF - Biomaterials
IS - 19
ER -