𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Stoichiometric measurements in nickel–hypophosphite baths for electroless deposition

✍ Scribed by Nima K. Dirjal; Kenneth A. Holbrook; Peter B. Wells

Book ID
102987084
Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
590 KB
Volume
290
Category
Article
ISSN
0003-2670

No coin nor oath required. For personal study only.

✦ Synopsis

Titrimetric methods and 31P NMR spectrometry have been compared for the determination of hypophosphite (H,PO;l and phosphite (I-IPO~-1 in both alkaline and acid solutions used in the electroless deposition of nickel-phosphorus alloys. It has been shown that reproducible and reliable redox titrimetric methods can be used to follow the changes in concentration of both species with time during the plating process. In addition, measurements of the phosphorus in the nickel deposit by conversion to phosphate in acidic solution and use of flow-injection analysis has enabled satisfactory phosphorus mass-balance in the system to be achieved.

📜 SIMILAR VOLUMES

Nickel Amperometric Detector Prepared by
Nickel Amperometric Detector Prepared by Electroless Deposition for Microchip Electrophoretic Measurement of Alcohols and Sugars
✍ Joseph Wang; Gang Chen; Madhu Prakash Chatrathi 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 235 KB

## Abstract Nickel was deposited directly at the end of an electrophoretic glass microchip using an electroless deposition procedure leading to an attractive amperometric detector for sugars and alcohols. Such direct electroless deposition of nickel at the end of the separation chip greatly simplif

Oxygen interaction of CdS-based gas sens
Oxygen interaction of CdS-based gas sensors with different stoichiometric compositions was studied by X-ray photoelectron spectroscopy (XPS) and thermal-desorption mass spectroscopy observations combined with conductivity measurements. Three different types of film with different atomic ratios of Cd/S were used in the study of oxygen chemisorption in a low-temperature range between 300 and 570 K. Spray pyrolysis was used for the deposition of the films on glass substrates; XPS and energy dispersive spectroscopy of X-ray together with atomic force microscopy and scanning electron microscopy were used for the characterization of the composition and structure of the films. It was possible to distinguish different temperature ranges for the thermal desorption of the different adsorbed oxygen species. A comparison of the data from XPS and mass-spectroscopy observations with conductance measurements allows to conclude that metallic surface atoms are responsible for different interactions of oxygen species with CdS surfaces.
📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 379 KB