Abstract
Compositing gold nanoparticles into conjugated molecules have been developed to be one of the most important approaches to increase stability, since degradation of conjugated materials is now one of the biggest bottle-necks to be conquered before industrialization application. Big-size colloidal gold nanoparticles with strong surface plasma resonance are designed to composite with conjugated molecules, in order to realize effective fluorescence enhancement and stabilization. The uniform composition film of hydrophilic colloidal gold nanoparticles (particle diameter of 30 nm) and hydrophobic carbazole functionalized fluorene trimers has been obtained by direct mixing of their aqueous and THF solutions, which is determined by AFM. By the comparison of composition based on fluorene trimers with similar structures, we have found that peripheral carbazole group and molecular size of fluorene trimers play an important role in the balance of incompatible solubility, which is regarded as increasing solubility of fluorene trimers in mixed solvent, connecting AuNP and peripheral carbazole groups, and restraining aggregate of gold nanoparticle. This allows facile hydrophilic gold nanoparticle to disperse uniformly in hydrophobic π-conjugated host. Our investigations show that fluorescence intensity of composition film is enhanced by 4 folds, and heat treatment (200°C for 4 h) for the composition film does not induce the degradation of conjugated backbone without the appearance of low-energy emission band, demonstrating the prominent potency of gold nanoparticles in enhanced fluorescence and stability of conjugated molecules and polymers.
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References
Friend R H, Gymer R W, Holmes A B, et al. Electroluminescence in conjugated polymers. Nature, 1999, 397: 121–128
Yan M, Rothberg L J, Papadimitrakopoulos F, et al. Defect quenching of conjugated polymer luminescence. Phys Rev Lett, 1994, 73: 744–747
Scherf U, List E J W. Semiconducting polyfluorenes-Towards reliable structure-property relationships. Adv Mater, 2002, 14: 477–487
Park J H, Lim Y T, Park O O, et al. Polymer/gold nanoparticle nanocomposite light-emitting diodes: Enhancement of electroluminescence stability and quantum efficiency of blue-light-emitting polymers. Chem Mater, 2004, 16: 688–692
Hsu S L, Chou C H, Chen C P, et al. Blue electroluminescence enhancement of poly{2,7-(9,9′-dioctylfluorene)-co-4-diphenylamino-4′-bipenylmethylsulfide} incorporating side-chain-tethered gold nanoparticles. Adv Funct Mater, 2007, 17: 2534–2541
Lance Kelly K, Coronado E, Zhao L L, et al. The optical properties of metal nanoparticles: The influence of size, shape, and dielectric environment. J Phys Chem B, 2003, 107: 668–677
Underwood S, Mulvaney P. Effect of the solution refractive index on the color of gold colloids. Langmuir, 1994, 10: 3427–3430
Jana N R, Gearheart L, Murphy C J. Seeding growth for size control of 5–40 nm diameter gold nanoparticles. Langmuir, 2001, 17: 6782–6786
Qiao L F, Wang D, Zuo L J, et al. Localized surface plasmon resonance enhanced organic solar cell with gold nanospheres. Appl Energ, 2011, 88: 848–852
Kinkhabwala A, Yu Z, Fan S, et al. Large single-molecule fluorescence enhancements produced by a bowtie nanoantenna. Nat Photon, 2009, 3: 654–657
Fort E, Grésillon S. Surface enhanced fluorescence. J Phys D: Appl Phys, 2008, 41: 013001
Lakowicz J R, Geddes C D, Gryczynski I, et al. Advances in surface-enhanced fluorescence. J Fluorescence, 2004, 14: 425–441
Chen S H, Yu S T, Liou Y Y, et al. Increasing the PLED luminescence efficiency by exploiting the surface plasmon resonance effect. J Electrochem Soc, 2011, 158: J53–J57
Fujiki A, Uemura T, Zettsu N, et al. Enhanced fluorescence by surface plasmon coupling of Au nanoparticles in an organic electroluminescence diode. Appl Phys Lett, 2010, 96: 043307
Subramanya Mayya K, Caruso F. Phase transfer of surface-modified gold nanoparticles by hydrophobization with alkylamines. Langmuir, 2003, 19: 6987–6993
Lala N, Lalbegi S P, Adyanthaya S D, et al. Phase transfer of aqueous gold colloidal particles capped with inclusion complexes of cyclodextrin and alkanethiol molecules into chloroform. Langmuir, 2001, 17: 3766–3768
Liu L L, Lu P, Xie Z Q, et al. Role of nonemissive quenchers for the green emission in polyfluorene. J Phys Chem B, 2007, 111: 10639–10644
Liao J, Zhang Y, Yu W, et al. Linear aggregation of gold nanoparticles in ethanol. Colloid Surf A, 2003, 223: 177–183
Pramod P, Thomas K G. Plasmon coupling in dimers of Au nanorods. Adv Mater, 2008, 20: 4300–4305
Link S, El-Sayed M A. Size and temperature dependence of the plasmon absorption of colloidal gold nanoparticles. J Phys Chem B, 1999, 103: 4212–4217
Tang S, Liu M R, Gu C, et al. Synthesis and electrochemical properties of peripheral carbazole functional ter(9,9-spirobifluorene)s. J Org Chem, 2008, 73: 4212–4218
Tang S, Liu M R, Lu P, et al. Fluorene trimers with various 9,9′-substituents: The synthesis, characteristics, condensed state structures, and electroluminescence properties. Org Electron, 2008, 9: 241–252
Morin J F, Beaupré S, Leclerc M, et al. Blue light-emitting devices from new conjugated poly(N-substituted-2,7-carbazole) derivatives. Appl Phys Lett, 2002, 80: 341
Vukovic S, Corni S, Mennucci B. Fluorescence enhancement of chromophores close to metal nanoparticles. optimal setup revealed by the polarizable continuum model. J Phys Chem C, 2009, 113: 121–133
Liu L L, Tang S, Liu M R, et al. Photodegradation of polyfluorene and fluorene oligomers with alkyl and aromatic disubstitutions. J Phys Chem B, 2006, 110: 13734–13740
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Liu, L., Xie, Z. & MA, Y. Uniform composition film of hydrophilic colloidal gold nanoparticles and hydrophobic carbazole functionalized fluorene trimers for enhanced fluorescence and stability. Chin. Sci. Bull. 58, 2741–2746 (2013). https://doi.org/10.1007/s11434-013-5869-0
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DOI: https://doi.org/10.1007/s11434-013-5869-0