Simplified determination of complex stoichiometry for colorimetric metal indicators by inkjet printing

The Analyst ◽  
2018 ◽  
Vol 143 (5) ◽  
pp. 1234-1241 ◽  
Author(s):  
Kento Kuwahara ◽  
Kentaro Yamada ◽  
Koji Suzuki ◽  
Daniel Citterio
Keyword(s):  
Inkjet Printing ◽  
Complex Stoichiometry ◽  
Binding Stoichiometry ◽  
Inkjet Printer

This paper presents the determination of complex binding stoichiometry for colorimetric metal indicators according to the Job plot method by means of an office inkjet printer in combination with digital colour analysis.

Deformation Compensation During Buoyancy-Enabled Inkjet Printing of Three-Dimensional Soft Tubular Structures

2017 ◽  
Vol 140 (1) ◽  
Author(s):  
Kyle Christensen ◽  
Zhengyi Zhang ◽  
Changxue Xu ◽  
Yong Huang
Keyword(s):  
Cross Section ◽  
Inkjet Printing ◽  
Three Dimensional ◽  
Structural Deformation ◽  
Tubular Structures ◽  
Axial Deformation ◽  
Buoyant Force ◽  
Drop On Demand ◽  
Biological Studies

Of various tissues being fabricated using bioprinting, three-dimensional (3D) soft tubular structures have often been the focus since they address the need for printable vasculature throughout a thick tissue and offer potential as perfusable platforms for biological studies. Drop-on-demand inkjetting has been favored as an effective technique to print such 3D soft tubular structures from various hydrogel bioinks. During the buoyancy-enabled inkjet fabrication of hydrogel-based soft tubular structures, they remain submerged in a solution, which crosslinks the printed structures and provides a supporting buoyant force. However, because of the low stiffness of the structures, the structural deformation of printed tubes poses a significant challenge to the process effectiveness and efficiency. To overcome this structural deformation during buoyancy-enabled inkjet printing, predictive compensation approaches are developed to incorporate deformation allowance into the designed shape. Circumferential deformation is addressed by a four-zone approach, which includes base, circular, vertical, and spanning zones for the determination of a designed cross section or compensated printing path. Axial deformation is addressed by the modification of the proposed circumferential compensation based on the distance of a given cross section to the junction of a branching tube. These approaches are found to enable the successful fabrication of straight and branching alginate tubular structures with nearly ideal geometry, providing a good foundation for the wide implementation of the buoyancy-enabled inkjetting technique. While inkjetting is studied herein as a model bioprinting process, the resulting knowledge also applies to other buoyancy-enabled bioprinting techniques.

Inkjet-Printing Enzyme Inhibitory Assay Based on Determination of Ejection Volume

2017 ◽  
Vol 89 (3) ◽  
pp. 2009-2016 ◽  
Author(s):  
Jungmi Lee ◽  
Annie Agnes Suganya Samson ◽  
Joon Myong Song
Keyword(s):  
Inkjet Printing

The 3D Printer Design and Model Formation by a Commercial Inkjet Printing Module

2008 ◽  
Vol 594 ◽  
pp. 500-506
Author(s):  
Chun I Cheng ◽  
Chun Hao Chen ◽  
Wei Hsiang Lai ◽  
Sheng Jye Hwang ◽  
Sen Yung Lee
Keyword(s):  
Rapid Prototyping ◽  
Layer Thickness ◽  
Personal Computer ◽  
Inkjet Printing ◽  
Solid Model ◽  
3D Printer ◽  
Inkjet Printer ◽  
Model Formation ◽  
State Of Art ◽  
Better Than

This research utilizes a 2D printer mechanism from a commercial available inkjet printer, combines with hardware and software to build up a new concept 3D printer. This 3D printer can receive printing information from personal computer, and setting the required layer thickness to stack those layers into a solid model. The largest build volume is 300x420x350 mm, print head resolution is as high as 1200x2400 dpi, and the life of printer head is longer than 12 weeks which is far longer than 4 weeks of Z Corp’s. There are many specifications are better than or equivalent to those of Z Corp’s Z-510 which is the state-of-art machine of this powder based rapid prototyping.

scholarly journals Gold Inks for Inkjet Printing on Photo Paper: Complementary Characterisation

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 599
Author(s):  
Hanuma Reddy Tiyyagura ◽  
Peter Majerič ◽  
Matej Bračič ◽  
Ivan Anžel ◽  
Rebeka Rudolf
Keyword(s):  
Inkjet Printing ◽  
Ultrasonic Spray Pyrolysis ◽  
Cost Effective ◽  
Raw Material ◽  
Ultrasonic Spray ◽  
Angle Measurements ◽  
Icp Ms ◽  
Contact Angle Measurements ◽  
Printing Parameters

Nowadays, cost-effective, available, and flexible paper-based electronics play an essential role in the electronics industry. Herein, we present gold nanoparticles (AuNPs) as a potential raw material for gold inks in the future for such purposes. AuNPs in this research were synthesised using the ultrasonic spray pyrolysis (USP) technique from two precursors: gold (III) chloride tetrahydrate and gold (III) acetate. Synthesised AuNPs were collected in a suspension composed of deionised (D.I.) water and the stabiliser polyvinylpyrrolidone (PVP). AuNPs’ suspensions were subjected to the rotavapor process to obtain gold inks with higher Au concentration (>300 ppm). ICP-MS measurements, the size and shape of AuNPs, ζ-potential, Ultraviolet-visible (UV-Vis) spectrophotometry measurements, and scanning electron microscop y (SEM) of gold inks were carried out in order to find the optimal printing parameters. In the final stage, the optical contact angle measurements were performed using a set of polar to non-polar liquids, allowing for the determination of the surface free energy of gold inks. Inkjet printing of gold inks as defined stripes on photo paper were tested, based on the characterisation results.

scholarly journals Simulation study of droplet formation in inkjet printing using ANSYS FLUENT

2022 ◽  
Vol 2161 (1) ◽  
pp. 012026
Author(s):  
Neha Thakur ◽  
Hari Murthy
Keyword(s):  
Ethylene Glycol ◽  
Simulation Model ◽  
Inkjet Printing ◽  
High Viscosity ◽  
Droplet Formation ◽  
Nozzle Diameter ◽  
Print Quality ◽  
Ansys Fluent ◽  
Low Viscosity ◽  
Inkjet Printer

Abstract Flow simulations of jetting of inkjet drops are presented for water and ethylene glycol. In the inkjet printing process, droplet jetting behaviour is the deciding parameter for print quality. The multiphase volume of fluid (VOF) method is used because the interaction between two phases (air and liquid) is involved in the drop formation process. The commercial inkjet printer has a nozzle diameter of ∼73.2μm. In this work, a simulation model of inkjet printer nozzles with different diameters 40μm, 60μm, and 80μm are developed using ANSYS FLUENT software. It is observed that when water is taken as solvent then the stable droplets are generated at 60μm nozzle diameter till 9μs because of its low viscosity. For higher diameter, the stamen formation is observed. Ethylene glycol stable droplets are achieved at 80μm nozzle diameter till 9μs because of their high viscosity (∼10 times that of water). Along with the droplet formation, the sustainability of the droplet in the air before reaching the substrate is also important. The simulation model is an inexpensive, fast, and flexible alternative to study the ink characteristics of the real-world system without wasting resources.

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