Inkjet Printed Wiring Boards with Vertical Interconnect Access on Flexible, Fully Compostable Cellulose Substrates

2017 ◽  
Vol 3 (4) ◽  
pp. 1700250 ◽  
Author(s):  
Aleksandra Samusjew ◽  
Alice Lassnig ◽  
Megan J. Cordill ◽  
Krzysztof K. Krawczyk ◽  
Thomas Griesser
Keyword(s):  
Printed Wiring Boards ◽  
Cellulose Substrates ◽  
Vertical Interconnect

Clickable Cellulosic Surfaces for Peptide-Based Bioassays

2019 ◽  
Author(s):  
Maria Teresa Odinolfi ◽  
Alessandro Romanato ◽  
Greta Bergamaschi ◽  
Alessandro Strada ◽  
Laura Sola ◽  
...  
Keyword(s):  
Target Recognition ◽  
Real Case ◽  
Polymeric Coating ◽  
Healthy Controls ◽  
Nonspecific Adsorption ◽  
Cellulosic Materials ◽  
Cellulose Substrates

The use of peptides in paper-based analytics is a highly appealing field, yet it suffers from severe limitations. This is mostly due to the loss of effective target recognition properties of this relatively small bioprobes upon nonspecific adsorption onto cellulose substrates. Here, we address this issue by introducing a simple polymer-based strategy to obtain clickable cellulosic surfaces, that we exploited for the chemoselective bioconjugation of peptide bioprobes. Our method largely outperformed standard adsorption-based immobilization strategy in a challenging, real-case immunoassay, namely the diagnostic discrimination of Zika+ individuals from healthy controls. Of note, the clickable polymeric coating not only allows efficient peptides bioconjugation, but it provides favorable anti-fouling properties to the cellulosic support. We envisage our strategy to broaden the repertoire of cellulosic materials manipulation and promote a renewed interest in peptide-based paper bioassays.

Clickable Cellulosic Surfaces for Peptide-Based Bioassays

2019 ◽  
Author(s):  
Maria Teresa Odinolfi ◽  
Alessandro Romanato ◽  
Greta Bergamaschi ◽  
Alessandro Strada ◽  
Laura Sola ◽  
...  
Keyword(s):  
Target Recognition ◽  
Real Case ◽  
Polymeric Coating ◽  
Healthy Controls ◽  
Nonspecific Adsorption ◽  
Cellulosic Materials ◽  
Cellulose Substrates

The use of peptides in paper-based analytics is a highly appealing field, yet it suffers from severe limitations. This is mostly due to the loss of effective target recognition properties of this relatively small bioprobes upon nonspecific adsorption onto cellulose substrates. Here, we address this issue by introducing a simple polymer-based strategy to obtain clickable cellulosic surfaces, that we exploited for the chemoselective bioconjugation of peptide bioprobes. Our method largely outperformed standard adsorption-based immobilization strategy in a challenging, real-case immunoassay, namely the diagnostic discrimination of Zika+ individuals from healthy controls. Of note, the clickable polymeric coating not only allows efficient peptides bioconjugation, but it provides favorable anti-fouling properties to the cellulosic support. We envisage our strategy to broaden the repertoire of cellulosic materials manipulation and promote a renewed interest in peptide-based paper bioassays.

Whisker Formation in Copper Electroplating

2011 ◽  
Author(s):  
Theresa Han ◽  
Eunin Cho ◽  
Jinwoo Heo ◽  
Seoung Jae Lee
Keyword(s):  
Copper Sulfate ◽  
Surface Stress ◽  
Whisker Formation ◽  
Printed Wiring Boards ◽  
Copper Electroplating ◽  
Cu Electroplating ◽  
Solution Surface ◽  
Dry Film

Abstract In the manufacture of Printed Wiring Boards (PWB), unwelcome structures, such as nodules and whiskers can be formed during copper electroplating with copper sulfate. Copper (Cu) whiskers with lengths of up to a few hundred micrometers can lead to electrical shorts between layers or patterns. In this paper, we document factors that can affect the growth of Cu whiskers; decomposition of additives in the Cu electroplating solution, surface stress, acidic cleaner, and the ingredients of a dry film. Contaminants from outside of the electroplating bath and the ingredients of the dry film were shown as key components in the formation of Cu whiskers.

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