NEMS
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
FAREEDA
Active In SP
**

Posts: 1
Joined: Mar 2010
#1
03-03-2010, 08:04 PM


sir please provide me information about NEMS as im having seminar and presentation sir plz send me d full report
Reply
seminar-avatar
Active In SP
**

Posts: 549
Joined: Mar 2010
#2
04-03-2010, 06:59 PM

INTRODUCTION:
A biosensor is generally defined as a measurement system that consists of a probe with a sensitive biological recognition element, or bioreceptor, a physicochemical detector component, and a transducer in between.
A biosensor consists of usually three components 1) BIORECEPTORS 2) TRANSDUCERS
3) DETECTORS
Bio receptors“ It is a sensitive biological element . Transducer -Transduction can be accomplished by optical, electrochemical, and mass detection methods .
NANO SENSORS
The three types of Nano sensors with medical application possibilities are a) Cantilever array sensors and b) Nanotube sensors c) Nanowire sensors.
a)Cantilever array sensors:
Microfabricated cantilever array sensors are used as ultra-sensitive mechanical sensors converting (biochemical or physical processes into a recordable signal in microelectromechanical systems (MEMS) or nanoelectromechanical systems (NEMS).Cantilevers are typically rectangular-shaped silicon bars. The unique feature of microcantilevers is their ability to undergo bending due to molecular adsorption or bindinginduced changes in surface tension.

b) Nano tube based sensors:
Nano-sized carbon tubes coated with strands of DNA can create tiny sensors with abilities to detect odors and tastes, According to the researchers, arrays of these nanosensors could detect molecules on the order of one part per million, akin to finding a one-second play amid 278 hours of baseball footage or a single person. The researchers tested the nanosensors on five different chemical odorants, including methanol and dinitrotoluene, or DNT, a common chemical that is also frequently a component of military-grade explosives. The nanosensors could sniff molecules out of the air or taste them in a liquid, suggesting applications ranging from domestic security to medical detectors.

c) Nanowire-based sensors:
IT is a hybrid of two molecules that are extremely sensitive to outside signals: single stranded DNA, which serves as the 'detector,' and a carbon nanotube, which functions as 'transmitterâ„¢. By putting the two together and they become an extremely versatile type of sensor, capable of finding tiny amounts of a specific molecule." The size of such sensors each carbon nanotube is about a billionth of a meter wide.

NANO DETECTORS:
a) Nanoarray-based biodetection:
These nanoarrays occupy a surface area thousands of times smaller than a standard microarray and therefore present many novel applications. Three of the applications we will demonstrate are cytokine expression profiling nanoarrays for small animal model systems, reverse-phase nanoarrays for profiling malignant progression from laser capture microdissected tissue samples, and a nanoarray-based pathogen detection platform with biodefense applications called the ViriChip.

b) Nanoparticle-based biodetection

Full report:

.doc   NANO SENSORS AND DETECTORS-THEIR APPLICATIONS (NEMS).doc (Size: 302 KB / Downloads: 48)
Use Search at http://topicideas.net/search.php wisely To Get Information About Project Topic and Seminar ideas with report/source code along pdf and ppt presenaion
Reply

Important Note..!

If you are not satisfied with above reply ,..Please

ASK HERE

So that we will collect data for you and will made reply to the request....OR try below "QUICK REPLY" box to add a reply to this page

Quick Reply
Message
Type your reply to this message here.


Image Verification
Please enter the text contained within the image into the text box below it. This process is used to prevent automated spam bots.
Image Verification
(case insensitive)