Polystyrene nanospheres

In order to investigate this effect, ordered arrays of metallic nano-islands were fabricated on glass substrates by a process of natural lithography using monodisperse polystyrene nanospheres. The metal particle dimensions were tailored in order to tune the plasmon resonance wavelength to match the spectral absorption of the fluorophore. The fluorophore, Cy5 dye, which is widely used in optical immunoassays and has a medium quantum efficiency ( 0.3), was used in this preliminary study of the plasmonic enhancement effect. 

Qian HS, Li ZQ, Zhang Y (2008) Multicolor polystyrene nanospheres tagged with up-conversion fluorescent nanocrystals. Nanotechnology 19(255601)4... 

Transport of carboxylated polystyrene nanospheres (20 nm) across the BBB was studied in vivo following cerebral ischemia and reperfusion [100], A microdialysis probe was... 

Nanospheres are hollow nanosized particles (Figure 47.1C) that can be prepared by microemulsion polymerization or covering the surfaces of colloidal templates with thin layers of the desired material followed by selective removal of the templates (Hyuk Im et al., 2005). The carboxylated polystyrene nanospheres (20 nm) were evaluated for drug delivery... 

Cationic polystyrene nanosphere toxicity depends on cell-specific endocytic and mitochondrial injury pathways. ACS Nano 2(1) 85-96... 

Table 12. Results of surface coating of dean polystyrene nanospheres (188.5 nm) by graft copolymers (25a-25d) [47]...

Uchida T, Serizawa T, Ise H, et al. (2001). Graft copolymer having hydrophobic backbone and hydrophilic branches. 33. Interaction of hepatocytes and polystyrene nanospheres having lactose-immobilized hydrophilic polymers on their surfaces. Biomacromol. 2 1343-1346. 

Polystyrene Nanospheres One last early experiment is discussed here. Gaur and Wunderlich [1980] investigated the behavior of polystyrene nanospheres using... 

FIGURE 5.2 Surface area effect on the broadening of the glass transition temperature of polystyrene nanospheres and lamellar phases in block copolymers. Open squares are for lamellar phases, and filled triangles are for nanospheres. (Modified figure based on original from Gaur and Wunderlich [1980].)... 

Fluorescent polystyrene nanospheres Monitor BBB permeability following cerebral ischemia using implanted microdialysis probe 1841... 

Nanospheres 100 (HSA). See Polystyrene Nanospheres 100 (LPE). See Alcohol Nanospheres 100 Menthol. See Menthol Nanospheres 100 (NH). See Acrylates/ammonium methacrylate copolymer Nanospheres 100 (SA). See Styrene/acrylates, copolymer... 

T. Serizawa, H. Takeshita, M. Akashi Electrostatic Adsorption of Polystyrene Nanospheres onto the Surface of an Ultrathin Polymer Film Prepared by Using an Alternate Adsorption Technique , Langmuir 1998,14(15), 4088-4094. 

Pfaff A, Shinde VS, Lu Y et al (2011) Glycopolymer-grafted polystyrene nanospheres. Macromol Biosci 11 199-210... 

Table 3. Summary of LLS results of the polystyrene nanospheres in water and the polystyrene chains in toluene at 25°C. Reprinted from (1997) Macromolecules 30 6388 [42] with permission...

Surface modification by polymer adsorption is an alternative to surface modification by polymer grafting. For example, polystyrene nanospheres coated by Poloxamer or Poloxamine (Ilium and Davis, 1983 Muller, 1991) or poly(methyl methacrylate) colloidal carriers coated by Poloxamer (Trds-ter and Kreuter, 1988) circulate longer in blood. This family of surfactants consist of poly(propylene glycol) (PPG) blocks, which adsorb on the hydrophobic polystyrene surface, and of more hydrophilic PEG blocks, which stick out of the surface in aqueous solutions and prevent opsonin adsorption. In spite of the increase in blood circulation time, particle coating by polymer adsorption was found to have several drawbacks (Petrak, 1993) ... 

Colloidal systems like silica and polystyrene nanospheres are available in commerce as aqueous soluhons typ. 5-10 % in volume, wilh a good control of size and surface charactetishcs and funchonalizahon. 

Tiberto P, Boarino L, Celegato F, Coisson M, Enrico E, De Leo N, Vinai F, Allia P (2011) Synthesis of NigoFe20 and Co nanodot arrays by self-assembling of polystyrene nanospheres magnetic and microstructural properties. J Nanopart Res 13 4211... 

Polystyrene nanospheres can be also used as a specific template for the preparation of nanocomposites with organic materials. In fact, the electropolymerization can be carried out within the voids of polystyrene nanospheres giving rise to RANI honeycomb films with desirable pore size, pore wall widths, and film thickness [245]. 

Kosiorek, A., Kandulski, W., Glaczynska, H., and Giersig, M. (2005) Fabrication of nanoscale rings, dots, and rods by combining shadow nanosphere lithography and annealed polystyrene nanosphere masks. Small, 1 (4), 439-444. 

Mercaptoundecanoic acid (11-MUA), 1-octanethiol (1-OT), anti-biotin, 1-ethyl-3-[3-dimethylaminopropyl]carbodiimide hydrochloride (EDC), streptavidin, 10 mM and 20 mM phosphate buffered saline (PBS), pH = 7.4, (+)-biotinyl-3,6-dioxaoctanediamine (biotin), hexanes, methanol, ethanol, Ag wire (99.99%, 0.5 mm diameter), borosilicate glass substrates, tungsten vapor deposition boats, polystyrene nanospheres with diameters of 400 7 nm were received as a suspension in water and were used without further treatment. All materials were used without further purification. 

Jang, J. and Ha, H. (2002) Fabrication of hollow polystyrene nanospheres in microemulsion polymerization using triblock copolymers. Langmuir, 18,5613-5618. 

Streptavidin-coated fluorescent polystyrene nanospheres [Huospheies (green fluores cence) and TransFluospheres (red fluorescence)] were used in single color flow cytometry to detect the EGFR on A431 cells (human epidermoid carcinoma cells) [53]. The results showed that the fluorescent nanospheres provided a... 

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