Microbalance 625 -organisms

Mannelli I, Minunni M, Tombelli S, Mascini M (2003) Quartz crystal microbalance (QCM) affinity biosensor for genetically modified organisms (GMOs) detection. Biosens Bioelectron 18 129-140... 

Figure 3.1. Multichamber deposition system for organic light emitting diodes (S sample, RF 02 plasma generator, P vacuum pump, Sh shutter, Q quartz microbalance, C crucibles, M mask for electrode patterning, T tungsten wires for metal deposition).

Direct measurement of oxygen uptake can be performed with O2 sensors in the headspace of a closed system and organic deposition by measuring the weight changes with a quartz microbalance. This method was applied to investigate the dependence of jet fuel autoxidation on temperature and the presence of antioxidants . 

The process of Pb deposition depends on the presence of adsorbed species. On polycrystalline gold, in HCIO4 acid solutions, a combined quartz crystal microbalance and probe beam deflection methods have pointed to three stages of the process - (1) water molecules release from gold surface, (2) metal UPD associated with adsorbed OH ions replacement, followed by (3) water formation [274]. In the presence of adsorbed anions or organic... 

Liang, C., Yuan, C.Y, Warmack, R.J., Barnes, C.E., and Dai, S., Ionic liquids A new class of sensing materials for detection of organic vapors based on the use of a quartz crystal microbalance. Anal. Chem., 74,2172-2176, 2002. 

The luminescence of a thin film coated with [Re(CO)3(/u.-4,4 -bipyridine)Cl]4 was quenched by nitrobenzene vapor because of electron transfer. Recently, mesoporous thin films of [Re(CO)3(/u.-L)Cl]4 (L = 4,4 -pyrazine or 4,4 -bipyridine) have been utilized as sensors for volatile organic compounds (VOCs). The host-guest interaction between the rhenium cyclophanes and VOCs was confirmed by quartz crystal microbalance studies. 

K. Matsuura, K. Ariga, K. Endo, Y. Aoyama, Y. Okahata, Dynamic Analyses on Induced-fit Gaseous Guest Binding to Organic Crystals with a Quartz-Crystal Microbalance , Chem. Eur. J., 6, 1750 (2000)... 

The other films were produced to study the influence of the interface between the metal top contact and the organic semiconductor. Here, silicon wafers with a native oxide were used as substrates. The samples were provided by the group of Pflaum at the University of Stuttgart. To minimise impurities, like in the case of DIP, Pc (purchased from Fluka) is purified twice by gradient sublimation before being used as starting material. The films were prepared in UHV at a base pressure of about 7 x 10 mbar from a graphite effusion cell. The evaporation rate was about 3 A/s it was controlled by a quartz microbalance located next to the sample [8]. 

As substrate materials five different single crystals have been chosen potassium chloride (KC1), sodium chloride (NaCl), potassium acid phthalate (KAP) [27], muscovite mica [28], and phlogopite mica. All are cleaved in air and are transferred immediately into a high vacuum system (base pressure 2 x 10 8 mbar). Either right away or after annealing a clear low energy electron diffraction (MCP-LEED, Omicron) pattern is observed for each of them. Organic molecules are deposited from an effusion cell. The nominal deposited film thickness is estimated by a water-cooled quartz microbalance located next to the substrate. 

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