Nanoparticles organic

Sasaki, K. (2003) Single Organic Nanoparticles (eds H. Masuhara, H. Nakanishi and K Sasaki), Springer, Berlin, Chapter 9. 

Horn D and Rieger J. 2001. Organic nanoparticles in the aqueous phase—Theory, experiment, and use. Angewandte Chemie-International Edition 40(23) 4331 -361. 

Li H, Xu J, Yan H (2009) Ratiometric fluorescent determination of cysteine based on organic nanoparticles of naphthalene-thiourea-thiadiazole-linked molecule. Sensor Actuat B-Chem... 

Keywords Aggregation-induced enhanced emission (AIEE) Fluorescent organic nanoparticles Ion-association method Organic dye nanoparticles Reprecipitation method Restriction of intramolecular rotation Size-dependent optical properties... 

Organic nanoparticles of AIEE molecules can be highly emissive and thus be a useful fluorescence probe. In what follows, some examples prepared by the reprecipitation and ion-association methods are presented. 

The benzofuran-naphthyridine linked dye compound (ABAN, see Fig. 1) has been successfully converted to fluorescent organic nanoparticles [34], for which their photophysical properties such as spectral features and emission intensity are remarkably different from those at the molecular level (solution). The results are rationalized by coplanarization of the benzofuran-naphthyridine molecule in the nanoparticle to extend its effective conjugation length and hence increase the oscillator strength, as is similar to the cases described above. 

Masuhara H, Nakanishi H, Sasaki K (eds) (2003) Single organic nanoparticles. Springer, Berlin... 

Asahi T, Sugiyama T, Masuhara H (2008) Laser fabrication and spectroscopy of organic nanoparticles. Acc Chem Res 41 1790-1798... 

Yao H, Ou Z, Kimura K (2005) Ion-based organic nanoparticles synthesis, characterization and optical properties of pseudoisocyanine dye nanoparticles. Chem Lett 34 1108-1109... 

An B-K, Kwon S-K, Jung S-D, Park SY (2002) Enhanced emission and its switching in fluorescent organic nanoparticles. J Am Chem Soc 124 14410-14415... 

Lim S-J, An B-K, Jung S-D, Chung M-A, Park SY (2004) Photoswitchable organic nanoparticles and a polymer film employing multifunctional molecules with enhanced fluorescence emission and bistable photochromism. Angew Chem Int Ed 43 6346-6350... 

Bhongale CJ, Chang C-W, Lee C-S, Diau EW-G, Hsu C-S (2005) Relaxation dynamics and structural characterization of organic nanoparticles with enhanced emission. J Phys Chem B 109 13472-13482... 

Sun Y-Y, Liao J-H, Fang J-M, Chou P-T, Shen C-H, Hsu C-W, Chen L-C (2006) Fluorescent organic nanoparticles of benzofuran-naphthyridine linked molecules formation and fluorescence enhancement in aqueous media. Org Lett 8 3713-3716... 

Ou Z, Yao H, Kimura K (2007) Preparation and optical properties of organic nanoparticles of porphyrin without self-aggregation. J Photochem Photobiol A Chem 189 7-14... 

Peng AD, Xiao DB, Ma Y, Yang WS, Yao JN (2005) Tunable emission from doped l,3,5-triphenyl-2-pyrazoline organic nanoparticles. Adv Mater 17 2070-2073... 

Self-assembly of nanoparticles in well-ordered 2-D arrays represents a major goal in the fabrication of microelectronics devices (Sun et al. 2002, 2003). Different strategies have been developed to tackle the challenge of well-organized nanoparticles in a 2-D plate surface (Andres et al. 1996 Spatz et al. 2000). Schmid and coworkers (2000) reported a long-range ordered sulfonic acid functionalized nanoparticle array... 

A different aspect of preparation of an organized nanoparticles on a fluid is called as the rheotaxy technique. It is a well-established one to fabricate a well-crystallized film. Mobility of the atoms on the surface of the liquid substrate favors the aggregation of atoms in the growing films (41). In order to avoid a drawback of the rheotaxy, i.e., the negative effect of high surface tension of the substrate, a modification has been made by Romeo et al. (42,43), where they used substrates of elevated temperature close to but below their melting points. They prepared, e.g., ZnS Mn thin films on some low-melting metals such as Pb, Bi or Bi-Sb alloy. 

We have developed an oil-in-water and bicontinuous microemulsion inkjet ink composition comprising a solubilized hydrophobic dye which forms nanoparticles ("pigment-like") upon application on a substrate surface. The concept was demonstrated for direct patterning of water-insoluble organic molecules in the form of nanoparticles. The method is based on formation of thermodynamically stable oil-in-water microemulsions, in which volatile "oil" contains the dissolved organic molecules. As schematically illustrated in Fig. 3, the microemulsion droplets are converted into organic nanoparticles upon impact with the substrate surface due to evaporation of the volatile solvent. 

Magdassi S, Ben-Moshe M. (2003) Patterning of organic nanoparticles by Inkjet printing of microemulsions. Langmuir 19 939-942. 

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