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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 24 — Nov. 24, 2008
  • pp: 19410–19418

Electric field enhanced photoluminescence of CdTe quantum dots encapsulated in poly (N-isopropylacrylamide) nano-spheres

Brett W. Garner, Tong Cai, Zhibing Hu, and Arup Neogi  »View Author Affiliations

Optics Express, Vol. 16, Issue 24, pp. 19410-19418 (2008)

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Photoluminescence from CdTe quantum dots encapsulated within hydrogel nanospheres can be controlled by the application an external dc electric field. Dynamic light scattering measurement of hydrogel placed under an electric field shows the collapse of the hydrogel sphere from 312 to 180nm due to volume phase transition. Distances between quantum dots placed within the hydrogel sphere can be controlled by the applied field. A 50% enhancement in the PL intensity is observed under the influence of a dc field less than 5 V/cm. A red-shift in the peak PL intensity and emission from larger sized dots indicate energy transfer between the quantum dots. The collapse of gels is reversible and therefore has potential application in non-volatile memory devices.

© 2008 Optical Society of America

OCIS Codes
(160.2100) Materials : Electro-optical materials
(160.5470) Materials : Polymers
(250.5230) Optoelectronics : Photoluminescence
(160.4236) Materials : Nanomaterials
(250.5590) Optoelectronics : Quantum-well, -wire and -dot devices

ToC Category:

Original Manuscript: July 1, 2008
Revised Manuscript: October 30, 2008
Manuscript Accepted: November 7, 2008
Published: November 10, 2008

Brett W. Garner, Tong Cai, Zhibing Hu, and Arup Neogi, "Electric field enhanced photoluminescence of CdTe quantum dots encapsulated in poly (N-isopropylacrylamide) nano-spheres," Opt. Express 16, 19410-19418 (2008)

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  1. T. Tanaka, L. O. Hocker, G. B. Benedek, "Spectrum of light scattered from a viscoelastic gel," J. Chem. Phys. 59, 5151-5159 (1973). [CrossRef]
  2. A. Kikuchi, T. Okano, "Pulsatile drug release control using hydrogels," Adv. Drug Deliv. Rev. 54, 53-60 (2002). [CrossRef] [PubMed]
  3. M. Yamato, C. Konno, M. Utsumi, A. Kikuchi, T. Oano, "Thermally responsive polymer-grafted surfaces facilitate patterned cell seeding and co-culture," Biomaterials. 23, 561-565 (2002). [CrossRef] [PubMed]
  4. S.R. Carter and S. Rimmer"Aqueous compatible polymers in bionanotechnology," IEE Proc.-Nanobiotechnol. 152, 169-173 (2005). [CrossRef]
  5. J. Gao, B. J. Frisken, "Cross-Linker-Free N-Isopropylacrylamide Gel Nanospheres," Languir 19, 5212-5216 (2003). [CrossRef]
  6. K. Yamashita, O. Hashimoto, T. Nishimura, M. Nango, "Preparation of stimuli-responsive water absorbent," React. Funct. Poly. 51, 61-64 (2002). [CrossRef]
  7. T.C. Caykara, O. Ozyurek, O.J. Kantoglu, J. Guven, "Equilibrium swelling behavior of pH- and temperaturesensitive poly(N-vinyl 2-pyrrolidone-g-citric acid) polyelectrolyte hydrogels," Polym. Sci. B 38, 2063-2071 (2000). [CrossRef]
  8. T. Tanaka, I. Nishio, S. Sun, S. Nisho, "Collapse of Gels in an Electric Field," Science 218, 467-469 (1982). [CrossRef] [PubMed]
  9. M. Zrìnyi, "Intelligent polymer gels controlled by magnetic fields," J. Colloid Poly. Sci. 278, 98-103 (2000). [CrossRef]
  10. Y. Qui, K. Park, "Environment-sensitive hydrogels for drug delivery," Adv. Drug Delivery Rev. 54, 321-339 (2002).
  11. J. Kim, M.J. Serpe, A.L. Lyon, "Hydrogel Microparticles as Dynamically Tunable Microlenses," J. Am. Chem. Soc. 126, 9512-13 (2004). [CrossRef] [PubMed]
  12. R. Apkarian, E. R. Wright, V. A. Seredyuk, S. Eustis, L. A. Lyon, V. P. Conticelo, F. M. Menger, "In-Lens Cry-High Resolution Scanning Electron Microscopy: Methodologies for Molecular Imaging of Self-Assembled Organic Hydrogels," Microsc. Microanal. 9, 286-295 (2003). [CrossRef] [PubMed]
  13. Z. Hu, X. Lu, J. Gao, "Hydrogel Opals," Adv. Mater. 13, 1708-1712 (2001). [CrossRef]
  14. K. Kubota, S. Fujishige, I. Ando, "Solution properties of poly(N-isopropyl-acrylamide) in water," Polym. J. 22, 15-20 (1990). [CrossRef]
  15. R. H. Pelton and P. Chibante, "Preparation of aqueous lattices with N-isopropylacrylamide," Colloids Surf. 20, 247-256 (1986). [CrossRef]
  16. J. Wu, B. Zhou, Z. Hu, "Phase Behavior of Thermally Responsive Microgel Colloids," Phys. Rev. Lett. 90, 048304-048308 (2003). [CrossRef] [PubMed]
  17. R. Hamlen, C. Kent, S. Shafer, "Electrochemically activated contractile polymer," Nature 206, 1149-1150 (1965). [CrossRef]
  18. S. Hirotsu, "Electric-Field Induced Phase Transition in Polymer Gels," Jpn. J. Appl. Phys.Suppl. 24, 396-388 (1985).
  19. T. Shiga, T. Kurauchi, "Deformation of Polyelectrolyte Gels under the Influence of Electric Field," J. App. Poly. Sci. 39, 2305-2320 (1990). [CrossRef]
  20. T. Schica, Y. Hirose, A. Okada, T. Kurauchi, "Bending of Poly (Vinal Alcohol) -Poly (Sodium Acrylate) Composite Hdrogels in Electric Fields," J. Appl. Polym Sci. 44, 249-253 (1992). [CrossRef]
  21. T. Schica, Y. Hirose, A. Okada, T. Kurauchi, "Bending of Poly (Vinal Alcohol) -Poly (Sodium Acrylate) Composite Hdrogels in Electric Fields," J. Appl. Polym Sci. 44, 249-253 (1992). [CrossRef]
  22. J. Butty, N. Peyghambarian, "Room temperature optical gain in sol-gel derived CdS quantum dots," Appl. Phys. Lett. 69, 3224-3226 (1996). [CrossRef]
  23. J. Li, X. Hong, Y. Liu, D. Li, Y. Wang, J. Li, Y. Bai, T. Li, "Highly Photoluminescent CdTe/Poly(Nisopropylacrylamide Temperature-Sensitive Gels," Adv. Mater. 17, 163-166 (2005). [CrossRef]
  24. A. Neogi, S. Ghosh, J. Li, T. Cai, Z. Hu, "Enhanced Luminesence Efficiency from Hydrogel Microbead Encapsulated Quantum Dots," Mater. Res. Soc. Symp. Proc. 959, 0959-M02-09 (2007). [CrossRef]
  25. B.W. Garner, T. Cai, S. Ghosh, Z. Hu, A. Neogi, "Refractive index study of volume-phase transition in poly-acrylamide gels for optoelectronic applications" Communicated (2008); Proc. Material Research Soc. Meeting, Vol 32, Paper #: 1060-LL06-08 (2008).</other>

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