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Related Concept Videos

Electrospray Ionization (ESI) Mass Spectrometry01:12

Electrospray Ionization (ESI) Mass Spectrometry

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Higher molecular weight biomolecules are nonvolatile compounds that may decompose before ionizing or vaporizing during mass analysis with conventional electron impact ionization methods. Accordingly, electrospray ionization (ESI) is the favored method for vaporizing and ionizing biomolecules as it circumvents rapid fragmentation and enables the recording of mass signals for the entire biomolecule.
ESI utilizes electrical energy to transfer ions from the liquid phase of the sample into the...
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Electrolytes: van't Hoff Factor03:08

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Colligative Properties of Electrolytes
The colligative properties of a solution depend only on the number, not on the identity, of solute species dissolved. The concentration terms in the equations for various colligative properties (freezing point depression, boiling point elevation, osmotic pressure) pertain to all solute species present in the solution. Nonelectrolytes dissolve physically without dissociation or any other accompanying process. Each molecule that dissolves yields one...
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Related Experiment Video

Updated: Dec 20, 2025

Characterizing Bacterial Volatiles using Secondary Electrospray Ionization Mass Spectrometry SESI-MS
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Ion Concentration Effect on Nanoscale Electrospray Modes.

Fei Zheng1, Shuai Zhang1, Jingwen Mo1

  • 1Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, School of Mechanical Engineering, Southeast University, Nanjing, 211189, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)
|June 3, 2020
PubMed
Summary
This summary is machine-generated.

Ionic concentration dictates nanoscale electrospray modes, shifting control from voltage and pressure seen in larger systems. This discovery offers new ways to manage electrospray for various applications.

Keywords:
electrospray modesionic concentrationmolecular dynamics simulationnano electrospray

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Area of Science:

  • Physics
  • Chemistry
  • Materials Science

Background:

  • Electrospray is a technique used for various applications, including mass spectrometry and materials deposition.
  • Understanding the different electrospray modes (e.g., dripping and jetting) is crucial for controlling the process.
  • Existing research primarily focuses on macroscale electrospray systems, where voltage and pressure are dominant factors.

Purpose of the Study:

  • To investigate the phenomena and mechanism of electrospray modes at the nanoscale.
  • To determine the key factors influencing nanoscale electrospray behavior.
  • To explore potential applications of controlled nanoscale electrospray.

Main Methods:

  • Experimental investigations of nanoscale electrospray.
  • Molecular dynamics simulations to elucidate the underlying mechanisms.
  • Analysis of the interplay between electric field stress, surface tension, and ionic concentration.

Main Results:

  • Ionic concentration is identified as a critical factor in determining dripping versus jetting modes in nanoscale electrospray.
  • Molecular dynamics simulations reveal that electric field stress and surface tension competition drives these modes, similar to macroscale systems.
  • Nanoscale systems exhibit heightened sensitivity of these forces to ion distribution compared to macroscale systems, where voltage and pressure are more influential.

Conclusions:

  • In nanoscale electrospray, ion concentration becomes a dominant factor due to its influence on electric field stress and disruption of hydrogen bonds.
  • This finding provides a novel method for controlling nanoscale electrospray modes.
  • Potential applications include advancements in mass spectrometry, film deposition, and electrohydrodynamic printing.