The anhysteretic remanent magnetization of magnetite-silica composite nanoparticles

2017 ◽  
Author(s):  
Petr Kharitonskii ◽  
Anatoly Frolov ◽  
Kamil Gareev ◽  
Dmitry Korolev ◽  
Andrei Kosterov ◽  
...  
Keyword(s):  
Remanent Magnetization ◽  
Composite Nanoparticles ◽  
Anhysteretic Remanent Magnetization ◽  
Silica Composite

Preparation of Carboxyl-Functionalized Polystyrene/Silica Composite Nanoparticles

2004 ◽  
Vol 205 (16) ◽  
pp. 2197-2204 ◽  
Author(s):  
Zhong Zeng ◽  
Jian Yu ◽  
Zhao-Xia Guo
Keyword(s):  
Composite Nanoparticles ◽  
Silica Composite

Comparative study of sol–gel-hydrothermal and sol–gel synthesis of titania–silica composite nanoparticles

2005 ◽  
Vol 178 (5) ◽  
pp. 1395-1405 ◽  
Author(s):  
Zhijie Li ◽  
Bo Hou ◽  
Yao Xu ◽  
Dong Wu ◽  
Yuhan Sun ◽  
...  
Keyword(s):  
Comparative Study ◽  
Sol Gel ◽  
Composite Nanoparticles ◽  
Silica Composite ◽  
Sol Gel Synthesis

scholarly journals Identification of Porphyrin-Silica Composite Nanoparticles using Atmospheric Solids Analysis Probe Mass Spectrometry

MRS Advances ◽  
2019 ◽  
Vol 4 (38-39) ◽  
pp. 2079-2086
Author(s):  
Casey Karler ◽  
Kylea J. Parchert ◽  
James B. Ricken ◽  
Bryan Carson ◽  
Curtis D. Mowry ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Cellular Uptake ◽  
Hela Cells ◽  
Energy Transduction ◽  
Composite Nanoparticles ◽  
Growth Media ◽  
Glass Capillary ◽  
Silica Composite ◽  
Novel Method ◽  
Solids Analysis

ABSTRACTPorphyrins are vital pigments involved in biological energy transduction processes. Their abilities to absorb light, then convert it to energy, have raised the interest of using porphyrin nanoparticles as photosensitizers in photodynamic therapy. A recent study showed that self- assembled porphyrin-silica composite nanoparticles can selectively destroy tumor cells, but detection of the cellular uptake of porphyrin-silica composite nanoparticles was limited to imaging microscopy. Here we developed a novel method to rapidly identify porphyrin-silica composite nanoparticles using Atmospheric Solids Analysis Probe-Mass Spectrometry (ASAP-MS). ASAP-MS can directly analyze complex mixtures without the need for sample preparation. Porphyrin-silica composite nanoparticles were vaporized using heated nitrogen desolvation gas, and their thermo-profiles were examined to identify distinct mass- to-charge (M/Z) signatures. HeLa cells were incubated in growth media containing the nanoparticles, and after sufficient washing to remove residual nanoparticles, the cell suspension was loaded onto the end of ASAP glass capillary probe. Upon heating, HeLa cells were degraded and porphyrin-silica composite nanoparticles were released. Vaporized nanoparticles were ionized and detected by MS. The cellular uptake of porphyrin-silica composite nanoparticles was identified using this ASAP-MS method.

Sign in / Sign up

Export Citation Format

Share Document