Inkjet printing on transparency films for reagent storage with polyester–toner microdevices

Krauss, Shannon T.; Remcho, Thomas P.; Monazami, Ehsan; Thompson, Brandon L.; Reinke, Petra; Begley, Matthew R.; Landers, James P.

doi:10.1039/c6ay01878e

Cited by 11 publications

(9 citation statements)

References 25 publications

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“…It can be seen that the transparency film contained a layer of deposition with particulates ranging from less than 1 µm, and up to 25 µm in size (Figure 11A). Similar surface features were reported by other researchers who worked on inkjet printing transparency film (Krauss et al., ). The purpose of depositing these coating is unknown, although they may be related to improving receiving and holding the liquid inks (Kumar, ) and/or preventing the blocking of the substrate sheeting.…”

Section: Resultssupporting

confidence: 87%

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An inkjet‐printed sulfonephthalein dye indicator array for volatile amine detection

Luo

Lim

2020

Journal of Food Science

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Colorimetric indicators are versatile for applications such as intelligent food packaging, for reflecting the actual quality and/or monitoring distribution history of food products. In this study, a colorimetric indicator array composed of sulfonephthalein dyes was successfully developed by piezoelectric inkjet printing, for the detection of volatile aminesthe primary spoilage gases for fish and seafood products. The printing inks were formulated in water/ethanol/1-butanol mixture. By refilling the printer's cartridges with our formulated inks and controlling the red, green, and blue color parameters, a 7 × 9 indicator array was printed onto inkjet transparency films. The color response of the indicator array was tested with different volatile amines at various concentrations. The array indicator was capable of discriminating six different volatile amines: ammonia, trimethylamine, dimethylamine, triethylamine, piperidine, and hydrazine. The printability of the inks was investigated by characterizing their density, surface tension, and dynamic viscosity, dictating that all formulated inks were printable fluid. The microstructural morphologies of the printed dyes on transparency films were evaluated using scanning electron microscopy. Interactions of the dye with the volatiles were studied by Fourier transform infrared spectroscopy. In summary, the piezoelectric inkjet printing method presented in this study offers a convenient, efficient, and flexible means to fabricate colorimetric indicators for detecting food spoilage volatiles. These indicators are promising as sensing components in intelligent packaging systems, to reveal the freshness of fish products by correlating with quality parameters such as total volatile basic nitrogen, microbial growth, and sensory attributes. Further studies on the feasibility of using the array indicators in real food packaging systems, development of strategy to mitigate the potential migration of the indicator dyes, and designing array patterns optimal for machine/human interpretation, are important to commercialize the technology.Practical Application: Piezoelectric inkjet printing offers a convenient way to fabricate sensing materials and aligns with industrial packaging operations. The use of indicators on food package helps consumers more accurately perceive real-time food quality information.

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Section: Resultssupporting

confidence: 87%

Section: Surface Morphology Of Printed Indicatorssupporting

confidence: 87%

An inkjet‐printed sulfonephthalein dye indicator array for volatile amine detection

Luo

Lim

2020

Journal of Food Science

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“…Therefore, this technique is only limited to certain types of chemical reagent. For laser-printed polyester film, the microfluidic channel is formed by printing the device on a transparency film which is limited for continuous flow microfluidics [ 30 ].…”

Section: Related Workmentioning

confidence: 99%

Droplet Velocity Measurement Based on Dielectric Layer Thickness Variation Using Digital Microfluidic Devices

2018

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In recent years, the number of interdisciplinary research works related to the development of miniaturized systems with integrated chemical and biological analyses is increasing. Digital microfluidic biochips (DMFBs) are one kind of miniaturized systems designed for conducting inexpensive, fast, convenient and reliable biochemical assay procedures focusing on basic scientific research and medical diagnostics. The role of a dielectric layer in the digital microfluidic biochips is prominent as it helps in actuating microliter droplets based on the electrowetting-on-dielectric (EWOD) technique. The advantages of using three different material layers of dielectric such as parafilm, polytetrafluoroethylene (PTFE) and ethylene tetrafluoroethylene (ETFE) were reported in the current work. A simple fabrication process of a digital microfluidic device was performed and good results were obtained. The threshold of the actuation voltage was determined for all dielectric materials of varying thicknesses. Additionally, the OpenDrop device was tested by utilizing a single-plate system to transport microliter droplets for a bioassay operation. With the newly proposed fabrication methods, these dielectric materials showed changes in contact angle and droplet velocity when the actuation voltage was applied. The threshold actuation voltage for the dielectric layers of 10–13 μm was 190 V for the open plate DMFBs.

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“…Most commercialized lateral-flow strip tests, such as pregnancy-test strips, apply the spray-coating method for reagent deposition [ 71 , 72 ]. Inkjet printers are used to print spots or dots reagent onto the surface [ 73 , 74 ]. Inkjet printing is not a cutting-edge technology in microfluidics or biosensors; this method has already been demonstrated numerous times, especially in paper-based microfluidic devices.…”

Section: State-of-the-art Microfluidic Devices For Iron Deficiencymentioning

confidence: 99%

Potential Point-of-Care Microfluidic Devices to Diagnose Iron Deficiency Anemia

Yap

Soair

Talik

et al. 2018

Sensors

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Over the past 20 years, rapid technological advancement in the field of microfluidics has produced a wide array of microfluidic point-of-care (POC) diagnostic devices for the healthcare industry. However, potential microfluidic applications in the field of nutrition, specifically to diagnose iron deficiency anemia (IDA) detection, remain scarce. Iron deficiency anemia is the most common form of anemia, which affects billions of people globally, especially the elderly, women, and children. This review comprehensively analyzes the current diagnosis technologies that address anemia-related IDA-POC microfluidic devices in the future. This review briefly highlights various microfluidics devices that have the potential to detect IDA and discusses some commercially available devices for blood plasma separation mechanisms. Reagent deposition and integration into microfluidic devices are also explored. Finally, we discuss the challenges of insights into potential portable microfluidic systems, especially for remote IDA detection.

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Inkjet printing on transparency films for reagent storage with polyester–toner microdevices

Abstract: The use of overhead transparencies as substrates for the fabrication of microfluidic devices brings new capabilities in the creation of fully-integrated systems.

Cited by 11 publications

References 25 publications

An inkjet‐printed sulfonephthalein dye indicator array for volatile amine detection

An inkjet‐printed sulfonephthalein dye indicator array for volatile amine detection

Droplet Velocity Measurement Based on Dielectric Layer Thickness Variation Using Digital Microfluidic Devices

Potential Point-of-Care Microfluidic Devices to Diagnose Iron Deficiency Anemia

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