Talk:Biosensor

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Starting to have a fiddle with this. The applications edit is me, that's better but by no means exhaustive. I've also added a principles of detection section, it's basic but something to work on.Dwayne Dibly 00:21, 21 December 2005 (UTC)

I think the electronic nose link is wrong, I'm pretty sure the e-nose doesn't have any specific biological recognition elements. I'll leave it for now. Dwayne Dibly 00:21, 21 December 2005 (UTC) I think it's wrong too (biological sytems enginnering student).. I suspect that piezo based biosensors are not based on evanescent waves. Can anyone provide evidence that they are?

the electronic nose is based on electrical properties around an inorganic sensor. biosensors are specific because they an enzyme or other biological components. the e-nose on the other hand uses non-specific input often analysed with fuzzy logics or multivariate analysis. in short, an e-nose is not an biosensors. Benkeboy 11:14, 21 April 2006 (UTC)

piezoelectric based sensors are not based on evanescent waves because they are not optical. compare evanescent and evanescent wave. they are all about mechanical vibration. change in frequency and damping (evanescence?) depending on the amount of material that is adsorbed to the sensor and also viscoelastic properties and ability to bind water of the adsorbent. Benkeboy 11:14, 21 April 2006 (UTC)

piezoelectric sensors can be used with biological recognition, eg by binding antibodies on the sensor. antigens can bind and thus increase the mass (frequency shift) but also bind water or stretch out into the solution (damping).Benkeboy 11:14, 21 April 2006 (UTC)

I will edit this. I've already changed the definition to the correct form. I will also put right the rest when I get chance. The principles bit, in particular, is very muddled. There seems to be some confusion between optical and piezolelectric methods. The discussion of the transducer is also somewhat baffling. (User: Jeff Newman)

Added some additional applications relating to the use of SPR biosensorsArthurbagwaste 13:23, 13 March 2007 (UTC)

I added some info about the principle of an SPR biosensor. I notice that a previous edit had been deleted as spam, as it referred to a specific brandname of instrument. Is this really useful in this context? The IPR is strictly protected between these companies and each brand of sensor will usually have a unique mode of operation. The general descriptions are so complex and vague, that a specific description of a number of the major manufacturers sensors would probably be a lot easier to follow? Any thoughts on this?Arthurbagwaste 16:22, 13 March 2007 (UTC)

[edit] Biochemical

There is IUPAC definition of a biochemical biosensors at [1] (btw who removed the high light characters in the character box under the edit box?)Benkeboy (talk) 11:31, 23 January 2008 (UTC)