ALUMINIUM

AND TITANIUM

BIOSENSORS AND BIOCHIPS

VICTORIA SAURAMARÍA CASCALES

ALUMINIUM

DESCRIPTION•I’ts a chemical element in the boron group•Its symbol: Al •Its atomic number: 13•It’s a silvery white, soft, ductile metal. •Instead, it’s found combined in over 270 different minerals•The chief ore of aluminium is bauxite

HISTORY•Ancient Greeks and Romans used aluminium salts as: – dyeing mordants– astringents for dressing wounds

•The metal was first produced in 1825• Discovered by H. C. Oersted

PROPERTIES•It is a very abundant element in the nature•It is a light metal under point of merger•His color is white and reflects well the electromagnetic radiation•Good electrical and thermal driver

ALUMINIUM

USESThe uses that aluminium gives to nowadays are MULTIPLE and we can divide them by sectors: •Electricity and communication

•Transport

•Building and construction

•Packings

RECYCLING•It takes between 200 and 500 years to deteriorate

•Any product of aluminium can be recycled infinite times without losing his properties

•the material can be re-used

ALUMINIUM

TITANIUMHISTORY•Titanium was discovered included in a minera Great Britain by William Gregor•He found black sand by a stream•He noticed the sand was attracted by a magnet

DESCRIPTION•It is a metal of transition•It has a silver greyish color•It forms alloys with other elements to improve the mechanical presentations•It has a small thermal and electrical conductivity

PROPERTIES•Titanium is not free in the nature•It has a density of 4507 kg/m3 •Point of merger of 1675 °C •It is paramagnetic •Lighter than steel

TITANIUM

RECYCLING•The special steels can be recycled in junk yards or authorized residues managers

USESThe two most useful properties of the metal are corrosion resistance and the highest strength-to-density.

•Metallic alloys•Aeronautical and aerospace industry•In surgery•Heat interchangers in the desalination plants•In metallurgy

TITANIUM

BIOCHIPS•They’re essentially miniaturized laboratories•They can perform simultaneous biochemical reactions•Biochips enable researchers to :

‒ screen large numbers of biological analytest ‒ detection of bioterrorism agents.

BIOSENSORS•It’s an analytical device•It combines a biological component with a physicochemical component•It consists of three parts: – The biological sensor– The transducer– The detector