با توجه به رشد روزافزون نانو تکنولوژی در تمامی عرصه های علوم امروزه ساخت تراشه های هوشمند که قادر به تصمیم گیری منطقی با توجه به برنامه بارگذاری شده در حافظه میباشند.
locمخفف کلمه lab on chip به معنی ساخت آزمایشگر و تستر و به عبارتی ساخت یک روبات هوشمند در حد نانو میباشد که در زمینه های مختلف کاربرد دارد و تنها با لود برنامه داخل Romقادر به کنترل فرایندهای در حد نانو میباشیم.
از جمله کاربردهای آن ساخت سنسورهای الکترونیکی-شیمیایی است که به سه روش قادر به شناسایی ترکیبات خونی است که توضیحات بیشتر در متن زیر امده است.برای اطلاعات بیشتراینجارا کلیک کنید.
electrochemical Sensing
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Electrochemical biosensors use electrochemical methods for transduction. They can be subdivided in to three types:
Our simulations help designers optimize sensors in terms of process conditions, selection of buffer pH, membranes, and cell geometry, among others. The sample problem shown demonstrates how CFDRC engineers can use thier expertise to optimize an oxygen biosensor that works on the amperometric method. Simulations have been performed to quantitatively estimate how the signal varies with oxygen concentration, as well as to understand the more complex phenomenon of sensitivity of the assay due to variations in the diffusivity of the oxygen caused by Joule heating. |
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آی سی تست کننده وتشخیص نوع DNA که عملیات تقویت و تشخیص نوع آنرا به عهده دارد در موارد تشخیص و بهبود بیماریهای خاص که نیاز به کار در حد نانو و میکروسکوپیک دارد بکار گرفته می شود این تراشه ساخت شرکت MEMS است که در زمینه ساخت تراشه های در حجم بالا واندازه های بسیار کوچک فعالیت می کند. |
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DNA ANALYSIS CHIP
What it does? Who is it useful for? Why a compact solution? Since there is no practical way to clean the channels after use these devices are inevitably for single use only. In the conventional laboratory this method is done with bulky and costly equipment and can take several hours. What is the technology behind this device? Where else is MEMS used? STMicroelectronics is particularly strong in “system-on-chip” technology, and supplies chips to, inter alia, Alcatel, Nokia, Philips, Siemens and Sony, inkjet print-heads to HP, and automotive electronics systems to |
for more help and assist please reffer to this website :
http://www.generallibrary.com/Electronics.html
a reference website that contains useful information in electerical and electeronics engineering database.
وتصمیم گیری منطقی با توجه به برنامه لود شده را دارا میباشد.
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A supplement highlighting the latest applications and technological aspects of research across the chemical sciences.
Chemists in the US have developed microfluidic valve structures for lab-on-a-chip devices that reduce the number of controllers required off the chip.
Richard Mathies and colleagues at the University of California, Berkeley, created microfluidic valves that can be held open for minutes by pressure pulses as short as 120 ms. These are controlled independently using an on-chip pneumatic demultiplexer, a device that can control many outputs from a small number of inputs. These structures allow many on-chip valves to be controlled independently using only a few off-chip components.
Lab-on-a-chip devices shrink entire chemical or biochemical assays down to small microfluidic chips. The goal is now to shrink the controls: the off-chip computers, valves, switches and pumps that operate the chip. By decreasing the number of these controllers Mathies hopes to reduce the size, power consumption and cost of the chips.
On-chip pneumatic valves and pumps play an important role in lab-on-a-chip devices, but each independent valve currently requires a separate off-chip controller. This can lead to problems because a single chip may have hundreds of these valves.
Albert van den Berg, head of the lab-on-a-chip group at the University of Twente, the Netherlands, said this work is a major contribution to the microfluidics field. ‘The possibility of controlling a thousand independent valves with only eleven pneumatic controls is remarkable,’ he said.
‘The future lies in programmable lab-on-a-chip devices, generic platforms that can perform thousands of different assays simply by providing different inputs and running different programs,’ said Mathies. ‘Integrating the basic logic of device operation on-chip is a crucial first step toward realising this goal of programmable lab-on-a-chip devices,’ he said.
Sarah M Corcoran
BY :saeed zeigham jehani
What is DNA analysis chip (or Silicon Lab-on-Chip)?