Effective Identification and Highly Sensitive Quantification of Fructo-oligosaccharide Isomers with BiSe Nanosheet-Assisted Laser Desorption Ionization Mass Spectrometry.

The growing interest in fructo-oligosaccharides (FOSs) necessitates the effective monitoring of product quality. Identifying and quantifying FOS isomers from the same sources are challenging. Here, we report a new method using BiSe nanosheets as the matrix for matrix-assisted laser desorption ionization mass spectrometry (MALDI-MS), achieving effective differentiation of oligosaccharide isomers through MALDI-MS/MS.

Matrix enrichment by black phosphorus improves ionization and reproducibility of mass spectrometry of intact cells, peptides, and amino acids.

Intact (whole) cell matrix-assisted laser desorption/ionization mass spectrometry (MALDI-TOF MS) is an established method for biotyping in clinical microbiology as well as for revealing phenotypic shifts in cultured eukaryotic cells. Intact cell MALDI-TOF MS has recently been introduced as a quality control tool for long-term cultures of pluripotent stem cells. Despite the potential this method holds for revealing minute changes in cells, there is still a need for improving the ionization efficiency or peak reproducibility.

Laser Ablation Generation of Bismuth Selenide Clusters from Mixtures of Elements, Crystalline BiSe, or Thin Films: Laser Desorption Ionization (LDI) and Surface Assisted LDI Time-of-Flight Mass Spectrometry using Graphene and Nanodiamonds.

A bismuth-selenium system from mixtures of the powdered elements in various molar ratios and from BiSe crystals and/or thin films was studied using laser desorption ionization and surface assisted laser desorption ionization. The BiSe clusters were observed in both positive and negative ion modes, but the mass spectra were more intense, and also a higher number of clusters was formed in the positive ion mode than in the negative mode. The BiSe ( = 1-8), BiSe ( = 1-5), and BiSe ( = 1-6) clusters were detected.

Amorphous Ge-Bi-Se Thin Films: A Mass Spectrometric Study.

The Ge-Bi-Se thin films of varied compositions (Ge content 0-32.1 at. %, Bi content 0-45.

Laser ablation synthesis of carbon-phosphides from graphene/nanodiamond-phosphorus composite precursors: Laser desorption ionisation time-of-flight mass spectrometry.

Rationale: Carbon-phosphides are new and promising strategic materials with applications e.g. in optoelectronics.