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Direct patterning of silver particles on porous silicon by inkjet printing of a silver salt via in-situ reduction.

Chiolerio A, Virga A, Pandolfi P, Martino P, Rivolo P, Geobaldo F, Giorgis F - Nanoscale Res Lett (2012)

Bottom Line: Silver NPs were obtained by p-Si mediated in-situ reduction of Ag+ cations using solutions based on AgNO3 which were directly printed on p-Si according to specific geometries and process parameters.We performed both optical and scanning electron microscopes on the NPs traces, correlating the morphology features with the IjP parameters, giving an insight on the synthesis kinetics.The patterned NPs show good performances as SERS substrates.

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Affiliation: Istituto Italiano di Tecnologia, Center for Space Human Robotics, Corso Trento 21, Torino, 10129, Italy. alessandro.chiolerio@iit.it.

ABSTRACT
We have developed a method for obtaining a direct pattern of silver nanoparticles (NPs) on porous silicon (p-Si) by means of inkjet printing (IjP) of a silver salt. Silver NPs were obtained by p-Si mediated in-situ reduction of Ag+ cations using solutions based on AgNO3 which were directly printed on p-Si according to specific geometries and process parameters. The main difference with respect to existing literature is that normally, inkjet printing is applied to silver (metal) NP suspensions, while in our experiment the NPs are formed after jetting the solution on the reactive substrate. We performed both optical and scanning electron microscopes on the NPs traces, correlating the morphology features with the IjP parameters, giving an insight on the synthesis kinetics. The patterned NPs show good performances as SERS substrates.

No MeSH data available.


Optical mosaic image of the IjP lines. The contrast was increased by histogram equalization, helping to resolve the single droplet array in each line.
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Figure 1: Optical mosaic image of the IjP lines. The contrast was increased by histogram equalization, helping to resolve the single droplet array in each line.

Mentions: Concerning the W-based solutions, we obtained traces of Ag NPs, applying a double/multiple pass pattern since single IjP pass did not produce any NP synthesis. Both the pure H2O and the H2O:EG 1:1 solution resulted in a poor drop coalescence, where the occurrence of inter-drop necks increases with the pass numbers. The pure EG solution resulted in droplet coalescence and a complete NP stack formation, as determined by field emission scanning electron microscopy (FESEM). The pattern realized on p-Si consisted of strips, 15 mm in length and 500 μm in width (Figure 1).


Direct patterning of silver particles on porous silicon by inkjet printing of a silver salt via in-situ reduction.

Chiolerio A, Virga A, Pandolfi P, Martino P, Rivolo P, Geobaldo F, Giorgis F - Nanoscale Res Lett (2012)

Optical mosaic image of the IjP lines. The contrast was increased by histogram equalization, helping to resolve the single droplet array in each line.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3526385&req=5

Figure 1: Optical mosaic image of the IjP lines. The contrast was increased by histogram equalization, helping to resolve the single droplet array in each line.
Mentions: Concerning the W-based solutions, we obtained traces of Ag NPs, applying a double/multiple pass pattern since single IjP pass did not produce any NP synthesis. Both the pure H2O and the H2O:EG 1:1 solution resulted in a poor drop coalescence, where the occurrence of inter-drop necks increases with the pass numbers. The pure EG solution resulted in droplet coalescence and a complete NP stack formation, as determined by field emission scanning electron microscopy (FESEM). The pattern realized on p-Si consisted of strips, 15 mm in length and 500 μm in width (Figure 1).

Bottom Line: Silver NPs were obtained by p-Si mediated in-situ reduction of Ag+ cations using solutions based on AgNO3 which were directly printed on p-Si according to specific geometries and process parameters.We performed both optical and scanning electron microscopes on the NPs traces, correlating the morphology features with the IjP parameters, giving an insight on the synthesis kinetics.The patterned NPs show good performances as SERS substrates.

View Article: PubMed Central - HTML - PubMed

Affiliation: Istituto Italiano di Tecnologia, Center for Space Human Robotics, Corso Trento 21, Torino, 10129, Italy. alessandro.chiolerio@iit.it.

ABSTRACT
We have developed a method for obtaining a direct pattern of silver nanoparticles (NPs) on porous silicon (p-Si) by means of inkjet printing (IjP) of a silver salt. Silver NPs were obtained by p-Si mediated in-situ reduction of Ag+ cations using solutions based on AgNO3 which were directly printed on p-Si according to specific geometries and process parameters. The main difference with respect to existing literature is that normally, inkjet printing is applied to silver (metal) NP suspensions, while in our experiment the NPs are formed after jetting the solution on the reactive substrate. We performed both optical and scanning electron microscopes on the NPs traces, correlating the morphology features with the IjP parameters, giving an insight on the synthesis kinetics. The patterned NPs show good performances as SERS substrates.

No MeSH data available.