Clark Aluminosilicate Capillaries with Filament

Clark Aluminosilicate Capillaries with Filament

There has been increasing interest in fabricating micropipettes from aluminosilicate glass.

In comparison with borosilicate glass, aluminosilicate provides increased hardness, improved chemical durability, reduced electrical conductivity and a lower coefficient of thermal expansion. Like silicon, aluminum combines with oxygen to form tetrahedral networks and the Al-O bonds are very strong.

Item# Description U.S. List Price Quantity
30-0108 Aluminosilicate Capillaries with Filament, 1.0 mm OD, 0.53 mm ID, 100 mm L, Pkg. of 500
30-0109 Aluminosilicate Capillaries with Filament, 1.0 mm OD, 0.53 mm ID, 150 mm L, Pkg. of 500
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In comparison with borosilicate glass, aluminosilicate provides increased hardness, improved chemical durability, reduced electrical conductivity and a lower coefficient of thermal expansion. Like silicon, aluminum combines with oxygen to form tetrahedral networks and the Al-O bonds are very strong.

While the original ratio of a borosilicate capillary's inner to outer diameter remains unchanged over its total taper length, aluminosilicate glass demonstrates a marked tendency to thin as it is drawn to a tip. This behavior allows extremely fine tips to be formed.

While Clark micropipettes and microelectrodes are used primarily in intracellular and extracellular research, the end user can manufacture their own microelectrodes and micropipettes using standard pipette pulling and microforge techniques.

For more information, see:

  • Na/H Exchange, Vaughan-Jones, RD.; Grinstein Press, Ch.1 p.8
  • Effects of intracellular and extracellular pH on contraction in isolated mammalian cardiac muscle, Bountra, C. & Vaughan-Jones, R.D.; Journal of Physiology Volume 418 (1989)
Specifications
Composition 51.9% SiO2, 22.0% Al2O3, 7.8% P2O5, 7.7% MgO,
6.9% CaO, 2.1% B2O3, 1.4% BaO and 0.2% As2O3
Softening Temp 950°C
Dielectric Constant 6.2
Wall: OD Thickness Ratio 0.235
Tolerance (OD) ±0.05 mm



OD
(mm)
ID
(mm)
Wall
Thickness
(mm)
Tolerance
9mm)
LengthQty/PkgModelOrder #
1.0 0.53 0.24 ±0.5 100 mm 500 SM100F-10 30-0108
150 mm 500 SM100F-15 30-0109