Nanomaterials for Matrix-Free Laser Desorption/Ionization Mass Spectrometry

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanophotonics Materials and Devices".

Deadline for manuscript submissions: 18 August 2025 | Viewed by 551

Special Issue Editors


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Guest Editor
Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University in Torun, Torun, Poland
Interests: dairy products; bioactive food-derived proteins; food processing; microorganism studies; antimicrobial agents; plasmonic systems; NALDI-TOF-MS; functional nanoparticles; fuels
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Guest Editor Assistant
Nicolaus Copernicus University in Toruń, Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University in Toruń, Wileńska 4 Str., 87-100 Toruń, Poland
Interests: MALDI; SALDI; nanoparticles; mass spectrometry; metabolites
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Laser desorption/ionization (LDI) is one of the most popular ionization techniques currently used in mass spectrometry (MS). This technique is most commonly used in a variant of matrix-assisted laser desorption/ionization (MALDI), which uses a low-molecular-weight organic acid mixed with the sample to support the ionization process. However, this approach has some shortcomings, such as a high chemical background in the spectral region below an m/z of 700, making it difficult to analyze compounds giving signals in this spectral region, and inhomogeneous co-crystallization of analyte and matrix leading to the formation of so-called “sweet spots”, i.e., an inhomogeneous distribution of the analyte in the crystallizing matrix. For these reasons, increasing research attention is focused on the possibilities offered by the use of matrix-free systems based on nanostructures in laser methods, which are referred to as surface-assisted laser desorption/ionization (SALDI). The use of nanostructures in LDI MS has made it possible to analyze low molecular compounds, often at very low concentrations, without the presence of a matrix-derived chemical background, contributing to more applications of the LDI MS method.

In this Special Issue, we will discuss the latest information on the use of nanoparticles and nanostructures in matrix-free laser desorption/ionization mass spectrometry techniques.

Dr. Paweł Piotr Pomastowski
Dr. Adrian Arendowski
Guest Editors

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Keywords

  • laser desorption/ionization
  • MALDI
  • mass spectrometry
  • NALDI
  • nanomaterials
  • SALDI

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Published Papers (1 paper)

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Review

18 pages, 1379 KiB  
Review
Synthesis of Silver Nanoparticles by Chemical Vapor Deposition Method and Its Application in Laser Desorption/Ionization Techniques
by Kinga Robotnik, Tomasz Zieliński, Justyna Walczak-Skierska, Ewelina Sibińska, Paulina Rudzik, Piotr Piszczek, Aleksandra Radtke and Paweł Piotr Pomastowski
Nanomaterials 2025, 15(13), 973; https://doi.org/10.3390/nano15130973 - 23 Jun 2025
Viewed by 220
Abstract
Laser desorption/ionization techniques, such as matrix-assisted laser desorption/ionization (MALDI) and surface-assisted laser desorption/ionization (SALDI), are the basis of modern mass spectrometry, enabling the analysis of a wide range of chemical compounds, from small molecules to biopolymers. MALDI uses organic matrices to support ionization, [...] Read more.
Laser desorption/ionization techniques, such as matrix-assisted laser desorption/ionization (MALDI) and surface-assisted laser desorption/ionization (SALDI), are the basis of modern mass spectrometry, enabling the analysis of a wide range of chemical compounds, from small molecules to biopolymers. MALDI uses organic matrices to support ionization, while SALDI relies on inorganic surfaces or nanomaterials, which reduce background and improve measurement sensitivity. This review focuses on the potential of using silver nanoparticles (AgNPs) in LDI-MS, with particular emphasis on their synthesis from the gas phase (CVD, Chemical Vapor Deposition). The key role of nanostructures in increasing ionization efficiency and analytical selectivity is emphasized. The CVD technique enables precise control over the morphology, size, and distribution of nanoparticles, which translates into better repeatability and sensitivity of nanostructure-assisted laser desorption/ionization mass spectrometry (NALDI-MS) measurements. The latest achievements in this field are presented, as well as potential applications of CVD-produced AgNPs in analytical chemistry, environmental analysis, and the petrochemical industry. Full article
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