Thesis (Ph. D.)--University of Hong Kong, 2002. / Includes bibliographical references.

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Μελετήθηκε η ηλεκτροχημική εναπόθεση του νικελίου πάνω σε μια σειρά μέταλλα, όπως βανάδιο, μολυβδαίνιο και βολφράμιο. Ο χαρακτηρισμός έγινε με φασματοσκοπίες φωτοηλεκτρονίων απο ακτίνες-χ και υπεριώδες, καθώς και από ηλεκτρονικό μικροσκόπιο σάρωσης. για τις ηλεκτροχημικές μετρήσεις χρησιμοποιήθηκαν οι τεχνικές: κυκλική βολταμμετρία, διαγράμματα τάσης-έντασης και φασματοσκοπία σύνθετης αντίστασης. / Nickel electrodeposition on a series of metals, such as v,mo and w was investigated.the samples were characterized ex situ using photoelectron spectroscopy (xps and ups). the electrocatalytic activity of the deposited nickel adlayer was tested by means of impedance spectroscopy, potensiostatic and cyclic voltammetry measurements.

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<p>Selective serotonin re-uptake inhibitors (SSRIs) are a new class of antidepressants used mainly for the treatment of depression and other forms of related disorders. There are a number of side effects associated with these drugs which include loss of weight, sexual dysfunction, nervousness and nausea. A fast and reliable detection method such as biosensing for the determination of the SSRIs metabolic profile is therefore essential for the appropriate dosing of these drugs. Biosensors for the determination of the SSRIs biotransformation were prepared with cytochrome P450 (2D6) isoenzyme and poly (anilinonapthalene sulfonic acid) film electrochemically deposited on gold.</p>

<p>The particles of the Pt metal were well dispersed on carbon nanotubes when EG was used and in isopropanol poor dispersion was observed and no further investigation was done on them. The platinum wt% on the supports observed from EDS was 21.8, 19.10 and 16.74wt% for Pt/EMWCNT, Pt/LPGCNT and Pt/ commercial CNT respectively. Pt/LPGMWCNT showed high electro-catalytic activity of 2.48 mA and active surface area of 76 m2/g, toward oxygen reduction, observed from cyclic voltammogram in iv sulfuric acid. Pt/LPGMWCNT also showed better tolerance toward methanol, however it was not highly active towards methanol, and hence the methanol oxidation peak current observed between 0.75 and 08 potential was the smallest. In this study a wide range of instruments was used to characterize the properties and behavior of Platinum nanoparticles on multi-wall carbon nanotubes. To add to the already mentioned, Scanning electrochemical microscopy (SEM), proton induced x-ray emission (PIXE), scanning electrochemical microscopy (SECM) and Brunauer-Emmett Tellar (BET) were also used.</p>

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