Diamond electrophoretic microchips—Joule heating effects

Karczemska, A.; Witkowski, Dariusz; Ralchenko, V.G.; Bolshakov, A. P.; Sovyk, D. N.; Łysko, J.; Fijalkowski, Mateusz; Bodzenta, Jerzy; Hassard, J.

doi:10.1016/j.mseb.2010.11.003

Cited by 10 publications

(7 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other diamond containing microfluidic devices have been reported, e.g. by Babchenko et al , who fabricated PDMS based microfluidic devices bonded with diamond films 28 , and Karczemska et al ., who produced diamond based microfluidic devices fabricated through photolithography and etching, with considerable fabrication complexity and cost 29 .…”

Section: Introductionmentioning

confidence: 99%

Enhanced physicochemical properties of polydimethylsiloxane based microfluidic devices and thin films by incorporating synthetic micro-diamond

Cabot

Macdonald

Kalsoom

et al. 2017

Sci Rep

View full text Add to dashboard Cite

Synthetic micro-diamond-polydimethylsiloxane (PDMS) composite microfluidic chips and thin films were produced using indirect 3D printing and spin coating fabrication techniques. Microfluidic chips containing up to 60 wt% micro-diamond were successfully cast and bonded. Physicochemical properties, including the dispersion pattern, hydrophobicity, chemical structure, elasticity and thermal characteristics of both chip and films were investigated. Scanning electron microscopy indicated that the micro-diamond particles were embedded and interconnected within the bulk material of the cast microfluidic chip, whereas in the case of thin films their increased presence at the polymer surface resulted in a reduced hydrophobicity of the composite. The elastic modulus increased from 1.28 for a PDMS control, to 4.42 MPa for the 60 wt% composite, along with a three-fold increase in thermal conductivity, from 0.15 to 0.45 W m−1 K−1. Within the fluidic chips, micro-diamond incorporation enhanced heat dissipation by efficient transfer of heat from within the channels to the surrounding substrate. At a flow rate of 1000 μL/min, the gradient achieved for the 60 wt% composite chip equalled a 9.8 °C drop across a 3 cm long channel, more than twice that observed with the PDMS control chip.

show abstract

Section: Introductionmentioning

confidence: 99%

Enhanced physicochemical properties of polydimethylsiloxane based microfluidic devices and thin films by incorporating synthetic micro-diamond

Cabot

Macdonald

Kalsoom

et al. 2017

Sci Rep

View full text Add to dashboard Cite

show abstract

“…A polycrystalline diamond plate with a thickness of 530 µm was obtained with use of a microwave plasma-enhanced chemical vapor deposition (MW PECVD) system DF-100 (Russian Academy of Science, Moscow, Russia) using CH 4 /H 2 gas mixture [1,19]. The following conditions have been used: microwave power 3.6 kW, methane content 2%, total flow rate 800 sccm, pressure 87 Torr, substrate temperature 820 • C. Before the deposition, the Si substrate was seeded with suspension of a detonation nanodiamond in ethanol by a treatment in an ultrasonic bath.…”

Section: Methodsmentioning

confidence: 99%

“…Diamond can be considered as a very interesting material for biomedical applications, because of its excellent properties such as the highest known thermal conductivity, biocompatibility, chemical inertness and transparency to light. It is particularly interesting for microfluidic devices manufacturing [1,2]. Currently, many potential applications of diamond are limited by the difficulties in its processing.…”

Section: Introductionmentioning

confidence: 99%

Microstructures Manufactured in Diamond by Use of Laser Micromachining

et al. 2020

View full text Add to dashboard Cite

Different microstructures were created on the surface of a polycrystalline diamond plate (obtained by microwave plasma-enhanced chemical vapor deposition—MW PECVD process) by use of a nanosecond pulsed DPSS (diode pumped solid state) laser with a 355 nm wavelength and a galvanometer scanning system. Different average powers (5 to 11 W), scanning speeds (50 to 400 mm/s) and scan line spacings (“hatch spacing”) (5 to 20 µm) were applied. The microstructures were then examined using scanning electron microscopy, confocal microscopy and Raman spectroscopy techniques. Microstructures exhibiting excellent geometry were obtained. The precise geometries of the microstructures, exhibiting good perpendicularity, deep channels and smooth surfaces show that the laser microprocessing can be applied in manufacturing diamond microfluidic devices. Raman spectra show small differences depending on the process parameters used. In some cases, the diamond band (at 1332 cm−1) after laser modification of material is only slightly wider and shifted, but with no additional peaks, indicating that the diamond is almost not changed after laser interaction. Some parameters did show that the modification of material had occurred and additional peaks in Raman spectra (typical for low-quality chemical vapor deposition CVD diamond) appeared, indicating the growing disorder of material or manufacturing of the new carbon phase.

show abstract

“…49 The cryogenic deep reactive ion etching (RIE), cools the silicon chip to -110°C, before etching the silica away with fluorine radicals generated using a SF 6 /O 2 mixture. When using cryogenic RIE, the etching profile is very sensitive to the specific SF 6 /O 2 ratio.…”

Section: 32d Anisotropic Dry Etching Of Siliconmentioning

confidence: 99%