Lateral force removal of fungal spores to demonstrate how surface properties affect fungal spore retention.

Microbial biofouling on polymer surfaces can lead to their biodeterioration. This may result in deterioration of the surface, leading to cracking and fracturing. Fungal spores from 1957, 1988 and were tested to determine their strength of attachment on three surfaces, p(γ-MPS-co-MMA), p(γ-MPS-co-LMA) and spin-coated poly(methyl methacrylate) (PMMAsc), using lateral force measurements.

Diverse surface properties reveal that substratum roughness affects fungal spore binding.

Binding to surfaces by fungal spores is a prerequisite to biofilm formation. The interactions of polytetrafluoroethylene (PTFE), glass, and silicon with three fungal spores, of differing shapes and sizes ( 1957, 1988, and ), were investigated. A multifractal analysis was conducted to provide quantitative measures of density, dispersion, and clustering of spores on the surfaces.

Use of spherical particles to understand conidial attachment to surfaces using atomic force microscopy.

Binding of particles and spores to surfaces is a natural phenomenon which is a prerequisite for biofilm formation. Perpendicular force measurements were carried out using atomic force microscopy cantilevers modified with a polystyrene or glass sphere. The attachment of the spheres was tested against glass, PVAc, p(γ-MPSco-MMA), p(γ-MPS-co-LMA), PMMAsc, and silicon surfaces.

Ferrocenyl-Pyrenes, Ferrocenyl-9,10-Phenanthrenediones, and Ferrocenyl-9,10-Dimethoxyphenanthrenes: Charge-Transfer Studies and SWCNT Functionalization.

The synthesis of 1-Fc- (3), 1-Br-6-Fc- (5 a), 2-Br-7-Fc- (7 a), 1,6-Fc - (5 b), 2,7-Fc -pyrene (7 b), 3,6-Fc -9,10-phenanthrenedione (10), and 3,6-Fc -9,10-dimethoxyphenanthrene (12; Fc=Fe(η -C H )(η -C H )) is discussed. Of these compounds, 10 and 12 form 1D or 2D coordination polymers in the solid state. (Spectro)Electrochemical studies confirmed reversible Fc/Fc redox events between -130 and 160 mV.

Ferrocenyl naphthalenes: substituent- and substitution pattern-depending charge transfer studies.

The synthesis of a series of ferrocenyl-functionalized naphthalenes of type 2-Fc-CH (3a), 1-Fc-2-R-CH (3b, R = OMe; 3c, R = Me; 3d, R = H; 3e, R = CH(O)), 1,1'-(CH)Fc' (4), 1-Br-4-Fc-CH (6a), 1-Br-5-Fc-CH (6b), 1-Br-8-Fc-CH (6c), 2-Br-6-Fc-CH (6d), 1,4-Fc-CH (7a), 1,5-Fc-CH (7b), 1,8-Fc-CH (7c) and 2,6-Fc-CH (7d) (Fc = Fe(η-CH)(η-CH), Fc' = Fe(η-CH)) is reported. They are accessible either by the Suzuki-Miyaura or Negishi C,C cross-coupling reaction of FcB(OH) (1a) or FcZnCl (1b) with the appropriate bromo-naphthalenes 2a-e and 5a-d, respectively. The molecular structures of 3a-c, 3e, 4, 6b-d and 7a-d in the solid state were determined by single-crystal X-ray diffraction analysis.

Synthesis of Mg and Zn diolates and their use in metal oxide deposition.

The synthesis of complexes [M(OCHMeCHNMeCH)] (5, M = Mg; 7, M = Zn) is described. Treatment of MeHNCHCHNMeH (1) with 2-methyloxirane (2) gave diol (HOCHMeCHNMeCH) (3), which upon reaction with equimolar amounts of MR (4, M = Mg, R = Bu; 6, M = Zn, R = Et) gave 5 and 7. The thermal behavior and vapor pressure of 5 and 7 were investigated to show whether they are suited as CVD (= chemical vapor deposition) and/or spin-coating precursors for MgO or ZnO layer formation.

Crystal structure of (2-acetyl-ferrocen-1-yl)boronic acid.

(2-Acetyl-ferrocen-1-yl)boronic acid, [Fe(CH)(CHBO)] or 2-C(O)CH-1-B(OH)-Fc [Fc = Fe(η-CH)(η-CH)], crystallizes in the centrosymmetric space group 2/. The boronic acid functionality inter-acts intra-molecular hydrogen bonds with the acetyl group and with the -B(OH) functionality of an adjacent mol-ecule. The resulting centrosymmetric dimer exhibits an -positioning of the ferrocenyl moieties towards the central BO plane.

The effect of surface properties on the strength of attachment of fungal spores using AFM perpendicular force measurements.

Polymeric substrata may be biodegraded by fungal species resulting in damaged, weakened and unsightly materials. This process typically begins with fungal spore attachment to the surface. In order to better understand the processes that precedes a biofouling event, fungal spore attachment to a range of surfaces, was determined using perpendicular force measurements.