Integrated chemical analysis microsystems in space life sciences research

Cefai, Joseph J.; Barrow, David A.; Woias, Peter; Müller, Eckhard

doi:10.1088/0960-1317/4/4/002

Cited by 14 publications

(5 citation statements)

References 22 publications

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“…Recent developments have shown that microfabrication techniques offer a promising technology for miniaturizing and integrating chemical analysis systems (Burns et al 1996, 1998, Burke et al 1997, Cefa et al 1994, van der Berg and Bergvald 1995, Ramsey 1997, Anderson et al 1997, Marshall and Hodgson 1998. Potential applications include chemical process monitoring, medical diagnostics, and environmental testing.…”

Section: Introductionmentioning

confidence: 99%

Heat-transfer analysis of microfabricated thermocapillary pumping and reaction devices

Sammarco¹,

Burns²

2000

J. Micromech. Microeng.

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A heat-transfer analysis was performed on thermocapillary pumping, a surface-tension-based drop pumping mechanism. The analysis, which incorporates both fluid flow and energy transport through multiple device layers, reveals effective material, design, and operational choices that result in improved pumping performance. Important design factors include thermal conductivity, channel/substrate thickness, and the velocity of the liquid drops. Results for pumping a drop of water on a fused silica substrate with a glass channel show that uniform interface temperatures can be achieved with bottom heating as long as drop velocities remain below ∼0.1 cm s −1. The analysis was also extended to include thermal reaction channels. The reactor analysis verified that relatively uniform reaction temperatures were attainable with bottom heating as long as channel heights were below ∼100 µm.

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Section: Introductionmentioning

confidence: 99%

Heat-transfer analysis of microfabricated thermocapillary pumping and reaction devices

Sammarco¹,

Burns²

2000

J. Micromech. Microeng.

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“…55 Much research continues with the objective of providing reliable miniaturised systems with integrated ¯uid control. Micropumps [Institute for Microelectronics, Mainz (IMM)], valves [Twente Microproducts (TMP)], mixers (Microparts) and microsieve ®lters (Aquamarijn) are now commercially available, and the key technical challenge in this development is for system integrators and packaging solutions which have whole wafer, 57 modular two-dimensional (2-D) 58,59 and modular 3-D 60,61 schemes (Fig. 7).…”

Section: From Microsensors To Microanalysersmentioning

confidence: 99%

Microsystems technology for remote monitoring and control in sustainable agricultural practices

Roblin

Barrow

2000

J. Environ. Monitor.

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The future development of advanced sensor and microsystems technologies for use in agriculture is briefly discussed, within a general appraisal of the industrial requirements and the potential economic and ecological benefits to be derived from the employment of novel sensing systems in sustainable agricultural practices, such as precision farming. It is proposed that these technologies are potentially important monitoring tools for farmers and growers, and that a concerted programme of research and development is required to satisfy the future requirements of the agricultural industry.

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“…In particular, micro-systems for chemical analysis, i.e., micro total analysis systems (μ-TAS), have attracted attention as a new approach (Manz, et al, 1990, Cefai, et al, 1994, Verpoorte et al, 1994. A microfluidic device used for conducting the water quality testing, which was fabricated by using micro electro mechanical systems (MEMS) technologies, was also reported (Miyake, et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

Fundamental study on compact absorptiometer for water quality testing

Matsuzawa

Asano

Morita

2015

JAMDSM

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A compact absorptiometer for water quality testing that does not need a special technique to take measurements was studied where the absorbance of a sample solution could be stably measured without decreasing the sensitivity over time. Three types of devices were developed, namely, horizontal straight-line type, vertical straight-line type, and multiple reflection type, that consisted of a light emitting diode (LED), a photodiode (PD), and a glass capillary used as a sample cell. The results from our experiments conducted to detect the nitrite nitrogen in water, which is a factor in water pollution, were used to evaluate how these three devices perform. The shapes of the liquid surfaces at the end of the capillaries in the horizontal and vertical straight-line types, which had the LED, PD, and the glass capillary in line horizontally and vertically, respectively, significantly influenced the output voltage of the PD and this output significantly changed over time, so it was difficult to precisely measure the absorbance. The change in the shape of the liquid surface at the end of the capillary was particularly considerable in the horizontal straight-line type. On the other hand, in the multiple reflection type, which had reflective plates surrounding the glass capillary, the absorbance was measured quite stably because the light emitted by the LED did not transmit through the liquid surface at the end of the capillary and the output voltage of the PD was uninfluenced by the change in the shape of the liquid surface. Additionally, controlling the sensitivity of the absorbance was possible by adjusting the length of the reflective plates, i.e., adjusting the light path. The sample solution in this device did not come into direct contact with the reflective plate, so the device can suppress the decrease in the sensitivity caused by materials becoming directly attached to the reflection plate. The compact multiple reflection type device that was developed could be used in a manually operated portable absorptiometer and also in an automated water quality analysis system that incorporates mixing and flow devices.

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Integrated chemical analysis microsystems in space life sciences research

Cited by 14 publications

References 22 publications

Heat-transfer analysis of microfabricated thermocapillary pumping and reaction devices

Heat-transfer analysis of microfabricated thermocapillary pumping and reaction devices

Microsystems technology for remote monitoring and control in sustainable agricultural practices

Fundamental study on compact absorptiometer for water quality testing

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