1
|
Park B, Park J, Kim W, Na SY, Huh YH, Kim M, Choi EH. Light‐Emitting Microinlaid Spots Produced through Lateral Phase Separation by Means of Simple Single‐Inkjet Printing. SMALL SCIENCE 2022. [DOI: 10.1002/smsc.202200017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Byoungchoo Park
- Department of Electrical and Biological Physics Kwangwoon University Wolgye-Dong Seoul 01897 South Korea
- Department of Plasma-Bio Display Kwangwoon University Wolgye-Dong Seoul 01897 South Korea
| | - Jaewoo Park
- Department of Electrical and Biological Physics Kwangwoon University Wolgye-Dong Seoul 01897 South Korea
- Department of Plasma-Bio Display Kwangwoon University Wolgye-Dong Seoul 01897 South Korea
| | - Wonsun Kim
- Department of Electrical and Biological Physics Kwangwoon University Wolgye-Dong Seoul 01897 South Korea
| | - Seo Young Na
- Department of Electrical and Biological Physics Kwangwoon University Wolgye-Dong Seoul 01897 South Korea
| | - Yoon Ho Huh
- Department of Electrical and Biological Physics Kwangwoon University Wolgye-Dong Seoul 01897 South Korea
| | - Mina Kim
- Department of Electrical and Biological Physics Kwangwoon University Wolgye-Dong Seoul 01897 South Korea
| | - Eun Ha Choi
- Department of Electrical and Biological Physics Kwangwoon University Wolgye-Dong Seoul 01897 South Korea
- Department of Plasma-Bio Display Kwangwoon University Wolgye-Dong Seoul 01897 South Korea
| |
Collapse
|
2
|
Dybowska-Sarapuk L, Kielbasinski K, Arazna A, Futera K, Skalski A, Janczak D, Sloma M, Jakubowska M. Efficient Inkjet Printing of Graphene-Based Elements: Influence of Dispersing Agent on Ink Viscosity. NANOMATERIALS 2018; 8:nano8080602. [PMID: 30096800 PMCID: PMC6116204 DOI: 10.3390/nano8080602] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 07/20/2018] [Accepted: 07/27/2018] [Indexed: 11/16/2022]
Abstract
Inkjet printing is an excellent printing technique and an attractive alternative to conventional technologies for the production of flexible, low-cost microelectronic devices. Among many parameters that have a significant impact on the correctness of the printing process, the most important is ink viscosity. During the printing process, the ink is influenced by different strains and forces, which significantly change the printing results. The authors present a model and calculations referring to the shear rate of ink in an inkjet printer nozzle. Supporting experiments were conducted, proving the model assumptions for two different ink formulations: initial ink and with the addition of a dispersing agent. The most important findings are summarized by the process window regime of parameters, which is much broader for the inks with a dispersing agent. Such inks exhibit preferable viscosity, better print-ability, and higher path quality with lower resistivity. Presented results allow stating that proper, stable graphene inks adjusted for inkjet technique rheology must contain modifiers such as dispersing agents to be effectively printed.
Collapse
Affiliation(s)
- Lucja Dybowska-Sarapuk
- Faculty of Mechatronics, Warsaw University of Technology, Andrzeja Boboli 8, 02-525 Warsaw, Poland.
| | - Konrad Kielbasinski
- Institute of Microelectronics and Optoelectronics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw, Poland.
| | - Aneta Arazna
- Tele and Radio Research Institute, Ratuszowa 11, 03-450 Warsaw, Poland.
| | - Konrad Futera
- Faculty of Mechatronics, Warsaw University of Technology, Andrzeja Boboli 8, 02-525 Warsaw, Poland.
| | - Andrzej Skalski
- Faculty of Mechatronics, Warsaw University of Technology, Andrzeja Boboli 8, 02-525 Warsaw, Poland.
| | - Daniel Janczak
- Faculty of Mechatronics, Warsaw University of Technology, Andrzeja Boboli 8, 02-525 Warsaw, Poland.
| | - Marcin Sloma
- Faculty of Mechatronics, Warsaw University of Technology, Andrzeja Boboli 8, 02-525 Warsaw, Poland.
| | - Malgorzata Jakubowska
- Faculty of Mechatronics, Warsaw University of Technology, Andrzeja Boboli 8, 02-525 Warsaw, Poland.
| |
Collapse
|
3
|
Einat M. Fluid Micro-Reservoirs Array Design with Auto-Pressure Regulation for High-Speed 3D Printers. MICROMACHINES 2016; 7:mi7110202. [PMID: 30404374 PMCID: PMC6189859 DOI: 10.3390/mi7110202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 10/31/2016] [Accepted: 11/02/2016] [Indexed: 11/18/2022]
Abstract
Three dimensional (3D) printing technology is rapidly evolving such that printing speed is now a crucial factor in technological developments and future applications. For printing heads based on the inkjet concept, the number of nozzles on the print head is a limiting factor of printing speed. This paper offers a method to practically increase the number of nozzles unlimitedly, and thus to dramatically ramp up printing speed. Fluid reservoirs are used in inkjet print heads to supply fluid through a manifold to the jetting chambers. The pressure in the reservoir’s outlet is important and influences device performance. Many efforts have been made to regulate pressure inside the fluid reservoirs so as to obtain a constant pressure in the chambers. When the number of nozzles is increased too much, the regulation of uniform pressure among all the nozzles becomes too complicated. In this paper, a different approach is taken. The reservoir is divided into an array of many micro-reservoirs. Each micro-reservoir supports one or a few chambers, and has a unique structure with auto-pressure regulation, where the outlet pressure is independent of the fluid level. The regulation is based on auto-compensation of the gravity force and a capillary force having the same dependence on the fluid level; this feature is obtained by adding a wedge in the reservoir with a unique shape. When the fluid level drops, the gravitational force and the capillary force decrease with it, but at similar rates. Terms for the force balance are derived and, consequently, a constant pressure in the fluid micro-reservoir segment is obtained automatically, with each segment being autonomous. This micro reservoir array is suggested for the enlargement of an inkjet print head and the achievement of high-speed 3D printing.
Collapse
Affiliation(s)
- Moshe Einat
- Faculty of Engineering, Ariel University, Ariel 40700, Israel.
| |
Collapse
|
4
|
Affiliation(s)
- T. Johansson
- From the Department of Electrical Measurements, Lund Institute of Technology, and the Department of Biomedical Engineering, Lund University Hospital, Lund, Sweden
| | - J. Nilsson
- From the Department of Electrical Measurements, Lund Institute of Technology, and the Department of Biomedical Engineering, Lund University Hospital, Lund, Sweden
| | - N.-G. Holmer
- From the Department of Electrical Measurements, Lund Institute of Technology, and the Department of Biomedical Engineering, Lund University Hospital, Lund, Sweden
| | - C. H. Hertz
- From the Department of Electrical Measurements, Lund Institute of Technology, and the Department of Biomedical Engineering, Lund University Hospital, Lund, Sweden
| |
Collapse
|
5
|
A Novel Bearing Lubricating Device Based on the Piezoelectric Micro-Jet. APPLIED SCIENCES-BASEL 2016. [DOI: 10.3390/app6020038] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
6
|
Stüwe D, Mager D, Biro D, Korvink JG. Inkjet technology for crystalline silicon photovoltaics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:599-626. [PMID: 25482823 DOI: 10.1002/adma.201403631] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Revised: 10/05/2014] [Indexed: 06/04/2023]
Abstract
The world's ever increasing demand for energy necessitates technologies that generate electricity from inexhaustible and easily accessible energy sources. Silicon photovoltaics is a technology that can harvest the energy of sunlight. Its great characteristics have fueled research and development activities in this exciting field for many years now. One of the most important activities in the solar cell community is the investigation of alternative fabrication and structuring technologies, ideally serving both of the two main goals: device optimization and reduction of fabrication costs. Inkjet technology is practically evaluated along the whole process chain. Research activities cover many processes, such as surface texturing, emitter formation, or metallization. Furthermore, the inkjet technology itself is manifold as well. It can be used to apply inks that serve as a functional structure, present in the final device, as mask for subsequent structuring steps, or even serve as a reactant source to activate chemical etch reactions. This article reviews investigations of inkjet-printing in the field of silicon photovoltaics. The focus is on the different inkjet processes for individual fabrication steps of a solar cell. A technological overview and suggestions about where future work will be focused on are also provided. The great variety of the investigated processes highlights the ability of the inkjet technology to find its way into many other areas of functional printing and printed electronics.
Collapse
Affiliation(s)
- David Stüwe
- Fraunhofer Institute for Solar Energy Systems ISE, Heidenhoftsr. 2, 79110, Freiburg im Breisgau, Germany
| | | | | | | |
Collapse
|
7
|
Rodríguez-Rivero C, Del Valle EMM, Galán MA. Development of a new technique to generate microcapsules from the breakup of non-Newtonian highly viscous fluid jets. AIChE J 2011. [DOI: 10.1002/aic.12549] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
8
|
Öhrwall G, Ottosson N, Pokapanich W, Legendre S, Svensson S, Björneholm O. Charge Dependence of Solvent-Mediated Intermolecular Coster−Kronig Decay Dynamics of Aqueous Ions. J Phys Chem B 2010; 114:17057-61. [DOI: 10.1021/jp108956v] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- G. Öhrwall
- MAX-lab, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden, and Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden
| | - N. Ottosson
- MAX-lab, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden, and Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden
| | - W. Pokapanich
- MAX-lab, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden, and Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden
| | - S. Legendre
- MAX-lab, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden, and Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden
| | - S. Svensson
- MAX-lab, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden, and Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden
| | - O. Björneholm
- MAX-lab, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden, and Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden
| |
Collapse
|
9
|
|
10
|
Sanjana NE, Fuller SB. A fast flexible ink-jet printing method for patterning dissociated neurons in culture. J Neurosci Methods 2004; 136:151-63. [PMID: 15183267 DOI: 10.1016/j.jneumeth.2004.01.011] [Citation(s) in RCA: 178] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2003] [Revised: 01/09/2004] [Accepted: 01/09/2004] [Indexed: 11/21/2022]
Abstract
We present a new technique that uses a custom-built ink-jet printer to fabricate precise micropatterns of cell adhesion materials for neural cell culture. Other work in neural cell patterning has employed photolithography or "soft lithographic" techniques such as micro-stamping, but such approaches are limited by their use of an un-alterable master pattern such as a mask or stamp master and can be resource-intensive. In contrast, ink-jet printing, used in low-cost desktop printers, patterns material by depositing microscopic droplets under robotic control in a programmable and inexpensive manner. We report the use of ink-jet printing to fabricate neuron-adhesive patterns such as islands and other shapes using poly(ethylene) glycol as the cell-repulsive material and a collagen/poly-D-lysine (PDL) mixture as the cell-adhesive material. We show that dissociated rat hippocampal neurons and glia grown at low densities on such patterns retain strong pattern adherence for over 25 days. The patterned neurons are comparable to control, un-patterned cells in electrophysiological properties and in immunocytochemical measurements of synaptic density and inhibitory cell distributions. We suggest that an inexpensive desktop printer may be an accessible tool for making micro-island cultures and other basic patterns. We also suggest that ink-jet printing may be extended to a range of developmental neuroscience studies, given its ability to more easily layer materials, build substrate-bound gradients, construct out-of-plane structure, and deposit sources of diffusible factors.
Collapse
Affiliation(s)
- Neville E Sanjana
- Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology (MIT), Cambridge, MA, USA
| | | |
Collapse
|
11
|
Tsai SC, Luu P, Childs P, Tsai CS. Ultrasound-modulated twin-fluid atomization of a liquid jet. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 1999; 46:139-146. [PMID: 18238407 DOI: 10.1109/58.741524] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A resonant liquid capillary wave theory which extends Taylor's dispersion relation to include the sheltering effect of liquid surface inclination caused by air flow is presented. The resulting dispersion curves are compared to new experimental results of how drop-size and size distributions vary with surface tension and air velocity in both airblast and ultrasound-modulated twin-fluid atomization of liquids with a constant kinematic viscosity of 2 cSt. Good agreements between the theoretical predictions of relative growth rates of the capillary waves and the experimental results of drop-size and size distributions led to the conclusion that Taylor-mode breakup of capillary waves plays a very important role in twin-fluid (airblast) atomization of a liquid jet. Thus, the ultrasound-modulated twin-fluid atomization not only verifies the capillary wave mechanism but also provides a means for controlling the drop-size and size distributions in twin-fluid atomization, which has a variety of applications in fuel combustion, spray drying, and spray coating.
Collapse
Affiliation(s)
- S C Tsai
- Department of Electrical and Computer Engineering, University of California, Irvine, CA 92697, USA.
| | | | | | | |
Collapse
|
12
|
Petersson M, Nilsson J, Wallman L, Laurell T, Johansson J, Nilsson S. Sample enrichment in a single levitated droplet for capillary electrophoresis. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL SCIENCES AND APPLICATIONS 1998; 714:39-46. [PMID: 9746233 DOI: 10.1016/s0378-4347(98)00092-9] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
This paper describes sample enrichment in a single levitated droplet for capillary electrophoresis (CE) analysis. The droplet was trapped in an acoustical field. The minute sample volumes needed for the enrichment procedure were precisely handled using a piezoelectric flow-through liquid microdispenser. Droplets with a volume of 65 pl were ejected from the device at a repetition rate ranging from one single droplet up to several hundreds per second. By counting the number of droplets ejected and accumulated in the levitated drop the sample volume was controlled. Through solvent evaporation the analytes were enriched in the diminishing droplet. The droplet was then injected into a CE capillary and the analytes, dansyl-Gly and dansyl-Val dissolved in ethanol, were separated in a 100 mM borate buffer (pH 9.0) utilising UV-absorption detection at 200 nm near the capillary outlet. Enrichment of 36000 sample droplets (2.3 microl) through solvent evaporation in the levitated drop resulted in a concentration limit of detection (CLOD) of 15 nM for the dansylated amino acids as compared to a CLOD of 2.5 microM which was achieved using standard hydrodynamic injection without preconcentration.
Collapse
Affiliation(s)
- M Petersson
- Technical Analytical Chemistry, Center for Chemistry and Chemical Engineering, Lund University, Sweden
| | | | | | | | | | | |
Collapse
|
13
|
Deformation and solidification of droplets generated by a piezo-electric transducer. ACTA ACUST UNITED AC 1995. [DOI: 10.1007/bf00318250] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
14
|
Passow CH, Chun JH, Ando T. Spray deposition of a Sn-40 Wt Pct Pb alloy with uniform droplets. ACTA ACUST UNITED AC 1993. [DOI: 10.1007/bf02657250] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|