Biofilms represent an ancient, ubiquitous and influential form of life on earth. They are interesting both scientifically and because of their impacts on our environment, health and technology. Biofilm formation is initiated by attachment of bacterial cells from an aqueous suspension onto a suitable attachment substratum. While in certain, well studied cases initial attachment and subsequent bi...

Magnetic nanoparticles (NPs) have been assembled in films by using self-assembled monolayers (SAMs) of organic molecules. SAMs were prepared by the reaction of organotrialkoxysilanes with surface silanol groups of silicon wafers. SAMs were prepared and their surface was decorated either by amine or thymine groups which have the ability to immobilize iron oxide nanoparticles as monolayers. These...

This paper describes three types of gold electrodes, each with at least one spatiai dimension as small as 1 prm, fabricated using combinations of micromachining and molecular self-assembly. (i) Large-area (>0.1 mm2) arrays of band-type electrodes were formed by machining micrometer-wide grooves of bare gold into gold frlm covered with a -23-A-thick, electrically insulating, self-assembled monol...

Luan Xi,*,† Zhi Zheng,‡,§ Ngai-Sze Lam,‡ Heng-Yong Nie,† Oscar Grizzi,⊥ and Woon-Ming Lau† Surface Science Western, UniVersity of Western Ontario, London, Ontario, Canada, N6A 5B7, Physics Department, Chinese UniVersity of Hong Kong, Shatin, Hong Kong, P.R. China, Institute of Surface Micro and Nano Materials, Xuchang UniVersity, Xuchang, Henan, 461000, P. R. China, and Centro Atomico Bariloche...

The synthesis of five light absorbing triazolobithiophenic thiols, which were utilized for producing self-assembled monolayers (SAMs) on gold surfaces, is presented. The monolayer formation was monitored by cyclic voltammetry, indicating excellent surface coverage. The new triazolobithiophenic compounds exhibited an absorption maximum around 340 nm, which is close to the emission wavelength of ...

Octadecylphosphonic acid (OPA) forms monolayers on amorphous smooth titania surfaces. The OPA was deposited by immersion in tetrahydrofuran solutions. The process takes place rapidly at 2× 10−4 M OPA, evidence of which is an advancing water contact angle of approx. 100◦ after 10 s of immersion. The advancing water contact angle plateaus at 110± 2◦ after several hours. At lower concentrations (2...

Spin-Electronics (spintronics),is a relatively new field of research based on the utilization in electronic transport of the spin of the electrons in addition to their charge. Traditionally, inorganic metals, insulators and semiconductors have been used as the main components in spintronic devices. However, this situation is currently evolving and a new field called Organic Spintronics is rapid...

Trichloroalkylsilanes readily form self-assembled monolayers (SAMs) on mica surfaces. The present work uses scanning probe methods (atomic force microscopy (AFM), chemical force microscopy (CFM) and nanoindentation) to study aspects of the assembly process and the properties of some short chain forms of these self-assembled monolayers. The deposition of propyltrichlorosilane (CH3CH2CH2SiCl3, PT...

The knowledge of the potential between interacting colloidal particles is essential to describe and control the aggregation processes in which they are involved. However, interaction forces also bring out spatial ordering phenomena, which has been used to obtain helpful information on them in three-dimensional dispersions. In this paper we look into this possibility for colloidal monolayers spr...

We report the first results of surface collisions of pure hollow fullerenes ~C60, C70 and C78! and endohedral metallofullerenes ~Y@C82, Ca@C82 and Ca@C84!, isolated by liquid chromatography, against solid ~silicon and gold! surfaces and self-assembled monolayer ~SAM! films. The experiments have been performed by a reflectron type time-of-flight mass spectrometer modified for measuring surface-i...