Non-contact assessment of electrical performance for rapidly sintered nanoparticle silver coatings through colorimetry

Cherrington, Martyn A.; Claypole, Tim; Gethin, D. T.; Worsley, David; Deganello, Davide

doi:10.1016/j.tsf.2012.08.039

Cited by 7 publications

(7 citation statements)

References 22 publications

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“…Lower L* indicates that the sample becomes darker, and all printed samples show low light (L*) values near to 50. It is observed that there is no correlation between the conductivity and the tone obtained from the coordinates a* and b* in contrast to silver coatings of polymeric substrates, where it is demonstrated that s shifting in the a* and b* during sintering means best conductivity [ 37 ]. On the other hand, it is observed that the sample T8/T9, the one with more weight and less conductivity, shows the lowest L* value, being darker than the other samples.…”

Section: Resultsmentioning

confidence: 99%

Influence of Structure and Composition of Woven Fabrics on the Conductivity of Flexography Printed Electronics

et al. 2021

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The work is framed within Printed Electronics, an emerging technology for the manufacture of electronic products. Among the different printing methods, the roll-to-roll flexography technique is used because it allows continuous manufacturing and high productivity at low cost. Nevertheless, the incorporation of the flexography printing technique in the textile field is still very recent due to technical barriers such as the porosity of the surface, the durability and the ability to withstand washing. By using the flexography printing technique and conductive inks, different printings were performed onto woven fabrics. Specifically, the study is focused on investigating the influence of the structure of the woven fabric with different weave construction, interlacing coefficient, yarn number and fabric density on the conductivity of the printing. In the same way, the influence of the weft composition was studied by a comparison of different materials (cotton, polyester, and wool). Optical, SEM, color fastness to wash, color measurement using reflection spectrophotometer and multi-meter analyses concluded that woven fabrics have a lower conductivity due to the ink expansion through the inner part of the textile. Regarding weft composition, cotton performs worse due to the moisture absorption capacity of cellulosic fiber. A solution for improving conductivity on printed electronic textiles would be pre-treatment of the surface substrates by applying different chemical compounds that increase the adhesion of the ink, avoiding its absorption.

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Section: Resultsmentioning

confidence: 99%

Influence of Structure and Composition of Woven Fabrics on the Conductivity of Flexography Printed Electronics

et al. 2021

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“…In addition, during sintering/drying, the reflectivity of a silver thin film changes as the coalescence of the metal nanoparticles creates a surface reminiscent of a bulk metal [75,77,78]. Zenou et al [77] utilized a reflection probe coupled to a fibre spectrometer to monitor the spectral reflectivity as a potential noncontact technique.…”

Section: Characterization Of the Preprintmentioning

confidence: 99%

Towards in-situ quality control of conductive printable electronics: a review of possible pathways

Zhuldybina¹,

Ropagnol²,

Blanchard³

2021

Flex. Print. Electron.

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Over the past decade, printed electronics (PE) has shown great potential for a wide range of industries, from consumer goods, electronics, aerospace, automotive, pharmaceutical, biomedical, to textiles and fashion. The rapid development of printing technology has been strongly driven by the growth of the PE market and its many applications. Here, we review the latest trends in PE production quality control, focusing on emerging technologies such as terahertz spectroscopy, which may play a key role in the development of smart manufacturing of PE devices in the near future. We also provide a comparison with conventional quality control technologies or oﬀ-line measurements, such as four-point probe measurements, atomic force microscopy, optical microscopy, etc.

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“…[31][32][33][34][35] For instance, Cherrington et al demonstrated the selective sintering of Ag nanoparticle ink by using NIR radiation quickly without affecting polymer substrates. [36] Similarly, Gu et al reported the effectiveness of this technology for sintering silver ink printed in the roll-to-roll (R2R) process. [37] To date, previous studies have mainly reported investigating the use of NIR technologies for sintering metal nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

“…demonstrated the selective sintering of Ag nanoparticle ink by using NIR radiation quickly without affecting polymer substrates. [ 36 ] Similarly, Gu et al. reported the effectiveness of this technology for sintering silver ink printed in the roll‐to‐roll (R2R) process.…”

Section: Introductionmentioning

confidence: 99%

Flexible Hybrid Electronics via Near‐Infrared Radiation‐Assisted Soldering of Surface Mount Devices on Screen Printed Circuits

Kasi

Zareei

Gopalakrishnan

et al. 2023

Adv Elect Materials

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The development of flexible hybrid electronics (FHEs) with high‐throughput integration of electrical components onto digitally printed circuits has a wide range of applications, such as asset tracking, wearable electronics, and structural health monitoring. However, one of the major challenges with FHEs is the process of soldering the electrical components onto a printed circuit while having minimal thermal damage to the printed traces and their temperature‐sensitive polymeric substrates. Here, the possibility of utilizing near‐infrared (NIR) technology as a nondestructive photonic approach for rapid soldering and mounting electrical components onto printed circuits while keeping the polymer substrate at a relatively low temperature during the soldering process is investigated. Results of this systematic study show that FHEs prepared with the optimized NIR processing conditions produce the desired reflow of solder with effective electrical connection and metallic bonding of electrical components onto the conductive traces with excellent mechanical stability (no failure even after 1000 cycles of bending). Furthermore, using this technique and as a proof of concept, the fabrication of a wearable FHE device that provides a remote assessment of the wound exudate absorption in dressings and notifies caregivers of the appropriate time to change the dressing is demonstrated.

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Non-contact assessment of electrical performance for rapidly sintered nanoparticle silver coatings through colorimetry

Cited by 7 publications

References 22 publications

Influence of Structure and Composition of Woven Fabrics on the Conductivity of Flexography Printed Electronics

Influence of Structure and Composition of Woven Fabrics on the Conductivity of Flexography Printed Electronics

Towards in-situ quality control of conductive printable electronics: a review of possible pathways

Flexible Hybrid Electronics via Near‐Infrared Radiation‐Assisted Soldering of Surface Mount Devices on Screen Printed Circuits

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