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Multi-modal characterization of nanogram amounts of a photosensitive polymer
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10.1063/1.4788740
/content/aip/journal/apl/102/2/10.1063/1.4788740
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/2/10.1063/1.4788740
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Figures

Image of FIG. 1.
FIG. 1.

Schematic drawing of the experimental setup used for NTA integrated with PCDS. The heater temperature is controlled using a micro ceramic heater with a programmable temperature controller. The 100 kHz pulsed IR light with 5% duty cycle from the QCL is electrically burst at 80 Hz, directed to the PVCN-coated microcantilever, and scanned from 5.835 μm to 6.4 μm (1714 cm−1 to 1562 cm−1 in wavenumber) with a spectral resolution of 5 nm. The NTA and PCDS signals are measured by optical beam deflection method.

Image of FIG. 2.
FIG. 2.

Measured temperature-dependent shifts in the resonance frequency of the PVCN-coated cantilever and the estimated Young's modulus of the coated PVCN after various periods of UV irradiation time: 0 min (black), 5 min (red), 15 min (light green), 30 min (blue), and 60 min (magenta).

Image of FIG. 3.
FIG. 3.

(a) Measured temperature-dependent variations in the deflection of the PVCN-coated cantilever after various periods of UV irradiation time: 0 min (black), 5 min (red), 15 min (light green), 30 min (blue), and 60 min (magenta). The inset shows variations in the Tg of the coated PVCN as a function of UV irradiation time. (b) Measured deflection at 60 °C (black squares), the temperatures of local minima in heating cycle (red triangles) and in cooling cycle (blue circles) as a function of UV irradiation time. Error bars are too small compared to symbols. (c) Differential deflection at the temperatures of local minima between heating and cooling cycles as a function of UV irradiation time. The lines are drawn to guide the eyes.

Image of FIG. 4.
FIG. 4.

(a) PCDS spectra of PVCN as a function of UV irradiation time: 0 min (black), 5 min (red), 15 min (light green), 30 min (blue), and 60 min (cyan). (b) Variations in the intensity of the normalized PCDS peak (magenta triangles) at 6.11 μm (1637 cm−1 in wavenumber) and the normalized multi-physics signals: Young's modulus (navy squares), static deflection (purple circles), and the differential deflection (black inverted triangles) as a function of UV irradiation time. The lines are drawn to guide the eyes.

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/content/aip/journal/apl/102/2/10.1063/1.4788740
2013-01-18
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Multi-modal characterization of nanogram amounts of a photosensitive polymer
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/2/10.1063/1.4788740
10.1063/1.4788740
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