Long Memory from Sauerbrey Equation: A Case in Coated Quartz Crystal Microbalance in terms of Ammonia

<table>Measured <svg height="13.575" id="M88" style="vertical-align:-2.34499pt" version="1.1" viewbox="0 0 21.9625 13.575" width="21.9625" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,13.575)">
<g transform="translate(72,-61.14)">
<text transform="matrix(1,0,0,-1,-71.95,63.52)">
<tspan style="font-size: 12.50px; " x="0" y="0">Δ</tspan>
<tspan style="font-size: 12.50px; " x="9.0271664" y="0">𝑓</tspan>
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</g>
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</svg> of the Pd-doped ZnO nanotetrapods to the concentration of NH<sub>3</sub> from 0 to 240 ppm in time.</table>

Mathematical Problems in Engineering

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Figure 2

Figure 2: Long Memory from Sauerbrey Equation: A Case in Coated Quartz Crystal Microbalance in terms of Ammonia 