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Samples of a colloidal dispersion of silicon dioxide nanoparticles (nano-SiO2) with a nominal size of 22 nm (trade name Ludox TM-40, Sigma Aldrich) were characterised by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) surface area analysis, transmission electron microscopy (TEM), fourier transform infrared (FTIR) spectroscopy and dynamic light scattering (DLS). Prior to TEM characterisation, the nano-SiO2 colloid suspension was diluted in water, deposited on a 300 mesh carbon coated copper grid (Agar Scientific, UK) and left to dry at room temperature overnight. Images were collected on a Hitachi 7100TEM using an accelerating voltage of 100 kV. TEM particle size was determined by measuring the diameter of 100 particles on selected TEM images using Digital Micrograph software. 

For DLS measurements, the silicon dioxide nanoparticles(nano-SiO2) colloidal suspension was diluted to a concentration of 40 μg/ml in MilliQ water (25°C) or cell culture medium (37°C) in the presence or absence of serum (see below for compositions), mixed by vortexing for 2 min and then transferred into disposable cuvettes for measurements using a Zetasizer Nano ZS (Malvern Instruments, UK) equipped with a He-Ne 633 nm laser. Measurement conditions were as follows: scattering angle of 173°, temperature equilibration time of 2 min, size distribution analysis algorithm (built within the DLS software) used to calculate particle size from the measured diffusion coefficient using non-negative least squares analysis. Particle surface charge was calculated from the measurement of electrophoretic mobility at 25°C in undiluted nano-SiO2 suspensions using approximately 1 ml of sample loaded into a disposable zeta cell and analysed using the Zetasizer instrument.

For XRD, BET surface area, and FTIR analyses the silicon dioxide nanoparticles (nano-SiO2) colloidal dispersion was dried to a powder in an oven at 60°C for 24 h. XRD was performed using an Enraf-Nonius diffractometer coupled to an INEL CPS 120 position-sensitive detector with Co Kα radiation. BET surface area was measured using a Micrometrics Gemini surface area analyser (Micromeritics, USA) linked to a FlowPrep 060 degasser by nitrogen adsorption using five adsorption points with P/P0 of 0.05–0.3. Samples were degassed overnight at 100°C for at least 12 h under flowing nitrogen gas prior to analysis. For FTIR spectroscopy the sample was mixed with potassium bromide to form a pellet prior to analysis using a PerkinElmer Spectrum 1 FTIR (PerkinElmer, UK).

Two different silicon dioxide nanoparticles (nano-SiO2) colloid (Code A, C) and gas SiO2 (code FS) as a pigment formulated into coatings produce color inkjet printing paper, print quality and paper characteristics of the three studies.The results show that use three pigment preparations whiteness and smoothness is closer Inkjet ink absorbency of law is the best vapor SiO2. After using a Canon printer to print two colloidal SiO2 Inkjet ink dot roundness and Gas SiO2 quite Inkjet, Inkjet Paper and ink dot area slightly larger than the gas phase SiO2.



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