Home About Us News Conferences Contact Technical Support Products.... Integrated glovebox Valved RF crackers Valved Organic Evaporators Nanocluster solutions Mini e-beam evaporators Thermal gas crackers RF atom sources RF ion sources DC ion sources Low energy ion sources Ion milling systems Ionised beam K-cells Mini ion guns Compound dissociation K-cell Gas dosers
	Fullerene & pentacene flux-control data Fullerene must first be thermally-annealed in vacuum in order to obtain a stable vapour pressure1,2. Figure 1 shows uncontrollable pressure fluctuations from as-supplied C60, measured with a quartz crystal microbalance (QCM). Figure 2 shows stable flux-control QCM data following thermal annealing for twenty hours at 350ºC. In contrast, as-supplied pentacene exhibits a stable vapour pressure, without recourse to pre-annealing (figure 3) Figure 4 shows the linear flux change with valve position. Figure 5 shows the fullerene beam profile at 150mm from a single-apertured ORG50V evaporator. 1 Pan, C. et al., J. Phys. Chem. 96, 6752, 1992 2 Popovic, A. et al., Rapid Comm. Mass Spec. 8, 985, 1994 Valved Organic evaporators ORG50V
Last updated: 23rd July 2010 Copyright 2008 The Vacutec Group Home About Us News Conferences Contact Technical Support