Determination of Polystyrene Layer Thickness and Zinc Phthalocyanine (Znpc) with Modified Sauerbrey Equations and Scanning Electron Microscope (SEM)

Lalu A Didik, Eka Rahmawati, Fadli Robiandi, Susi Rahayu, Abdurrouf Abdurrouf, Djoko H. Santjojo, Setyawan P. Sakti, Masruroh Masruroh

Abstract


The thickness measurement of PS thin films on QCM surface and ZnPc layer on QCM/PS using Sauerbrey equation and Scanning Electron Microscope (SEM) has been investigated. Calculation result using a modified Sauerbrey equation show the thickness of PS layer and ZnPc one are 0,45 μm and  0,0676 μm respectively. Additionally the thickness measurement by using SEM shows the thickness of PS  layer is 5,33 μm and the  thickness of ZnPc layer is 10,44 μm. The differences thickness between Sauerbrey equation and SEM topograph is due to layers porosity. The topography of thin films produced by the secondary electron beam scanning allows to get a magnification of SEM image so that it can be measured directly. While the thickness calculation using the Sauerbrey equation is based on the change in the resonance frequency of QCM.


Keywords


Polystirene; ZnPc; QCM; Thin Films; Sauerbrey equation; SEM; Porosity

Full Text:

PDF

References


Movla, Hossein (2014), Simulation Analysis of the Aluminium Thin Film Thickness Measurement by Using Low Energy Electron Beam, Optik, 125(1): 71-74.

Mariappan, R. (2014), Influence of Film Thickness on The Properties of Sprayed ZnO Thin Films for Gas Sensor Applications, Supperlatices and Microstructure, 71(2014): 238-249.

Senthilarasu, S. (2005), Substrate Temperature Effects on Structural Orientation and Optical Properties of Zinc Phthalocyanine (ZnPc) Thin Films, Material Science and Engineering B, 122: 100-105.

Abdullah, M. dan Khairurrijal (2009), Review: Karakterisasi Nanomaterial Jurnal Nanosains dan Nanoteknologi 2(1).

Markx, Kenneth A. (2003), Quartz Crystal Microbalance: A Useful Tool for Studying Thin Polymer Films and Complex Biomolecular Systems at the Solution-Surface Interface, American Chemical Society, 4(5).

Feng, Tan dan Huang Xian He. (2013), Relations between Mass Change and Frequency Shift of QCM Sensor in Contact with Viscoelastic Medium, Chinese Physical Society 30(5), 050701

Llanes, D. S. (2005), Interface Layer to Improve Polystyrene Attachment on a Quartz Crystal Resonator, Revista EIA 4: 9-19.

Sakti, S.P, et al. (2012), Improvement of Biomolecule Immobilization on Polystyrene Surface by Increasing Surface Roughness. J. Biosensor and Bioelectron 3(3) 1000119

Atashbar, Massod Z. (2005), QCM Biosensor with Ultra Thin Polymer Film, Sensor and Actuators B 107: 945-951.




DOI: http://dx.doi.org/10.21776/ub.natural-b.2014.002.04.6

Refbacks

  • There are currently no refbacks.