A multi-scale approach to electrospray ion source modeling has been developed. The evolution of a single-emitter plume in pure ionic regime is simulated with combination electrohydrodynamic fluids and n-body particle modeling. Simulations are performed for the liquid, EMI-BF4, firing positive pure-ion mode. metastable nature clusters captured using an fragmentation model informed by molecular d...

Many novel functional structures are now fabricated by controlled deposition as a maskless, bottom-up fabrication technique. These applications require rapid and precise deposition of minute amounts of solutions/suspensions or their ultimate particle products in predefined patterns. The electrospray is a promising alternative to the commonly used inkjet printing because it can easily handle hig...

Electrospray thrusters work by extracting ions or charged droplets directly from a liquid surface using an electrostatic field and accelerating them in that field to produce thrust [1]. This method could lead to more efficient and precise thrusters for space propulsion applications. Emission occurs from sharp emitter tips, which enhance the electric field and constrain the emission location. Th...

This paper describes an instant formation method of uniform-sized proteoliposomes for membrane protein assays using fluorescence microscopy. The applied electrospray technique was the same as our previous works [1], although here we directly sprayed proteovesicles (<1 μm size) dispersed in “an aqueous buffer” and micropatterned them on a substrate; technical problems/conditions of the electrosp...

We use a glass-based microfluidic device to study the electric current behavior of an electrospray process in the presence of a coflowing liquid. The current shows strong voltage dependence and weak flow rate dependence, in stark contrast to classical electrospray. By considering that the current is dominated by convection near the apex of the conical meniscus and driven by tangential electric ...

For the first time, a multi-residue methodfor simultaneous determination of 41LC-amenable pesticides in rice, belonging to different chemical classes has been developed in Iran by LC-MS/MS. The pesticides were analyzed simultaneously in a single run using positive electrospray ionization with multiple reaction monitoring (MRM) after extraction with slightly modified QuEChERS method. The calibra...

Partially-ligated anionic ruthenium carbonyl clusters react with alkenes, arenes, and alkanes in the gas phase; the products undergo extensive C-H activation and lose dihydrogen and carbon monoxide under collision-induced dissociation conditions. Triethylsilane and phenylsilane are also reactive towards the unsaturated clusters, and oxygen was shown to rapidly break down the cluster core by oxi...

Liquid chromatography/mass spectrometry (LC/MS), combining good separation characteristics with highly specific and sensitive detection, is the method of choice for forensic trace analysis of explosives. Principles of operation and instrumentation of several LC/MS interface/ionization modes are described. Among the various LC/MS interfaces and ionization modes, electrospray ionization (ESI)-LC/...