Synthesis of silver nano particles and fabrication of aqueous Ag inks for inkjet printing

The main problem in preparing stable and printable inks containing nanoparticles for inkjet printing is to overcome the strong agglomeration of the particles in dispersion medium. In this study, the silver particles with diameter around 50 nm were produced by a simple wet chemistry method. Stable aqueous printable inks were formulated by using the combination of a triblock copolymer and high intensity focused ultrasound (HIFU). Various factors that affect the ink stability, such as, copolymer content and time of HIFU treatment, were investigated. The ink containing 5 wt% silver has a viscosity of about 2 mPas and surface tension 30 mN/m at 25 ◦ C, which meet inkjet printer requirements. Such inks have been successfully printed on Al2O3 ceramics and low-temperature co-fired ceramics (LTCC) and the printed films show low resistivity.

[1]  Fei Huang,et al.  High-efficiency inverted top-emitting polymer light-emitting diodes , 2005 .

[2]  A. Mayer.  Colloidal metal nanoparticles dispersed in amphiphilic polymers , 2001 .

[3]  U. Schubert,et al.  Ink‐jet Printing and Microwave Sintering of Conductive Silver Tracks , 2006 .

[4]  R. A. Bayles,et al.  Small particle melting of pure metals , 1986 .

[5]  A. Manna,et al.  PIXE & XRD analysis of nanocrystals of Fe, Ni and Fe2O3 , 2007 .

[6]  Shlomo Magdassi,et al.  Silver Nanoparticles as Pigments for Water-Based Ink-Jet Inks , 2003 .

[7]  Larry A. Roe,et al.  A MEMS-based flexible sensor and actuator system for space inflatable structures , 2001 .

[8]  K. Teng,et al.  Liquid Ink Jet Printing with MOD Inks for Hybrid Microcircuits , 1987 .

[9]  Naoki Itoh,et al.  Effect of Small Size Beads on Dispersion of Nanometer-Sized Silica Particle by Wet Beads Mill Process , 2004 .

[10]  Shadi A. Dayeh,et al.  Micromachined infrared bolometers on flexible polyimide substrates , 2005 .

[11]  K. L. Lawrence,et al.  Micromachined integrated pressure–thermal sensors on flexible substrates , 2006 .

[12]  Takashi Tahara,et al.  Experimental investigation of nanoparticle dispersion by beads milling with centrifugal bead separation. , 2006, Journal of colloid and interface science.

[13]  J. Xue,et al.  Synthesis of PEOlated Fe3O4@SiO2 Nanoparticles via Bioinspired Silification for Magnetic Resonance Imaging , 2010 .

[14]  Jae-Woo Joung,et al.  Direct synthesis and inkjetting of silver nanocrystals toward printed electronics , 2006 .

[15]  Yee-Chia Yeo,et al.  Controlled insulator-to-metal transformation in printable polymer composites with nanometal clusters. , 2007, Nature materials.

[16]  Muyu Zhao,et al.  Size-dependent melting point of noble metals , 2003 .

[17]  Sawyer B. Fuller,et al.  Ink-jet printed nanoparticle microelectromechanical systems , 2002 .

[18]  Chih-Ming Ho,et al.  A flexible micromachine-based shear-stress sensor array and its application to separation-point detection , 2000 .

[19]  Brian Derby,et al.  A Low Curing Temperature Silver Ink for Use in Ink‐Jet Printing and Subsequent Production of Conductive Tracks , 2005 .

[20]  Reinhard R. Baumann,et al.  Inkjet Printing of Conductive Silver Patterns by Using the First Aqueous Particle-Free MOD Ink without Additional Stabilizing Ligands† , 2010 .

[21]  U. Schubert,et al.  Inkjet-printed silver tracks : low temperature curing and thermal stability investigation , 2008 .

[22]  P. Buffat,et al.  Size effect on the melting temperature of gold particles , 1976 .

[23]  Wei Wang,et al.  HIGHLY EFFICIENT SIZE REDUCTION OF NANOPARTICLES BY THE SHOCK WAVE METHOD , 2010 .

[24]  Seong-Gu Baek,et al.  Thermal behavior of direct-printed lines of silver nanoparticles , 2006 .

[25]  Sunho Jeong,et al.  Direct writing of silver conductive patterns: Improvement of film morphology and conductance by controlling solvent compositions , 2006 .

[26]  Young-Min Choi,et al.  Preparation of aqueous Ag Ink with long-term dispersion stability and its inkjet printing for fabricating conductive tracks on a polyimide film , 2010 .

[27]  D. A. Saville,et al.  Colloidal Dispersions: Equilibrium phase behavior , 1989 .

[28]  Patrick J. Smith,et al.  Direct ink-jet printing and low temperature conversion of conductive silver patterns , 2006 .

[29]  Jang‐Joo Kim,et al.  High-Performance Flexible Organic Light-Emitting Diodes Using Amorphous Indium Zinc Oxide Anode , 2007 .

[30]  U. Schubert,et al.  Inkjet Printing of Narrow Conductive Tracks on Untreated Polymeric Substrates , 2008 .