Calixarenes is widely used as a sensor material due to nanoporous film structure. We used a type of calix[4]arenes to observe the suitability of calixarenes paired with Pb2+ ions. Langmuir Blodgett technique was used to observe the surface pressure-area (Π-A) isotherm, surface potential-area (ΔV-A) isotherm and effective dipole moment (μ⊥) characteristic of the calixarenes due to the binding interaction. The radius of Calixarenes‘ cavity was determined from its isotherm and we found that the cavity‘s radius is inversely proportional to spreading volume. When the PbCl2 salt is introduced into the subphase, the Pb2+ions begin to interact with Mat 3 until stabilization is achieved indicating the greatest number of ions that can bind with Mat 3 has been reached. Hence, ion sensing of Pb2+ ions using Mat 3 can be achieved over the range of 0 - 6.50×10−2-2 mM..

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