𝔖 Bobbio Scriptorium
✦   LIBER   ✦

AFM studies of nanoparticle deposition via electrospray ionization

✍ Scribed by Joel Therrien; Amir Dindar; David Smith

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
158 KB
Volume
70
Category
Article
ISSN
1059-910X

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Electrospray ionization was used to deposit CdSe nanoparticles on graphite and InP substrates. The charge transferred to the substrate via the deposition was correlated to the number of particles found on the substrate by AFM observation. A charge per nanoparticle was determined from depositions of various lengths of time, which is ∼1 electron per nanoparticle. This value was found to be consistent for concentrations of nanoparticle solutions, which differed by an order of magnitude. Such a value may be used for predicting the density of nanoparticles deposited on a substrate during the deposition. It was found that above a critical concentration, the deposition process produced large clumps of particles rather than individual particles. At lower concentrations, individual particles deposited on the graphite substrates were found to be mobile, arranging themselves on step edges of the graphite. Microsc. Res. Tech., 2007. Β© 2007 Wiley‐Liss, Inc.

πŸ“œ SIMILAR VOLUMES

Practical implications of some recent st
Practical implications of some recent studies in electrospray ionization fundamentals
✍ Nadja B. Cech; Christie G. Enke πŸ“‚ Article πŸ“… 2001 πŸ› John Wiley and Sons 🌐 English βš– 417 KB

## Abstract | I. | Introduction | 363 | | II. | The Mechanics of ESI‐MS | 363 | | III. | Analyte Characteristics and Selectivity | 365 | | | A.  Charging the Analyte | 366 | | |   1. Ionization Through Charge Separation | 366 | | |   2. Adduct Formation | 366 | | |   3. Ionization Through Gas‐P

Fragmentation studies of pentacoordinate
Fragmentation studies of pentacoordinated bisaminoacylspirophosphoranes by negative electrospray ionization mass spectrometry
✍ Shuxia Cao; Yanchun Guo; Xinshuai Wu; Huamin Zhao; Yufen Zhao πŸ“‚ Article πŸ“… 2011 πŸ› John Wiley and Sons 🌐 English βš– 234 KB πŸ‘ 1 views

## Abstract Fragmentation pathways of a series of pentacoordinated bisaminoacylspirophosphoranes were elucidated by electrospray ionization multistage mass spectrometry (ESI‐MS^__n__^) in negative mode. The deprotonated ions of pentacoordinated bisaminoacylspirophosphoranes tend to eliminate a corr

Liquid chromatographic/electrospray ioni
Liquid chromatographic/electrospray ionization mass spectrometric studies of proanthocyanidins in foods
✍ Liwei Gu; Mark A. Kelm; John F. Hammerstone; Ze Zhang; Gary Beecher; Joanne Hold πŸ“‚ Article πŸ“… 2003 πŸ› John Wiley and Sons 🌐 English βš– 260 KB

## Abstract The proanthocyanidins in three foods (pinto beans, plums and cinnamon) were studied with electrospray ionization (ESI) mass spectrometry (MS) in the negative mode following separation by normal‐phase high‐performance liquid chromatography. The MS/MS analysis demonstrated that the major