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10.1021/acs.langmuir.5c01616 http://scihub22266oqcxt.onion/10.1021/acs.langmuir.5c01616 40642807!ä!40642807 Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\40642807.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117       Langmuir 2025 ; ä (ä): ä Nephropedia Template TP {{tp|p=40642807|t=2025. Nitroxide-Modified Silica Nanoparticles: Impact of Radical Density on Relaxometric and EPR Properties |pdf=|usr=}}{{40642807}} gab.com Text Nitroxide-Modified Silica Nanoparticles: Impact of Radical Density on Relaxometric and EPR Properties JO: Langmuir http://www.kidney.de/pget.php?&tw=1&pmid=40642807 #FOAvip In this study, we report the synthesis and characterization of nitroxide-functionalized silica nanoparticles incorporating a TEMPO-based spin label. These nanoparticles were prepared through a reverse microemulsion method, and the nitroxide moiety was introduced via a TEMPO-modified silane, synthesized by coupling 4-amino-TEMPO with 3-(triethoxysilyl)propylsuccinic anhydride. By adjusting experimental parameters, we successfully modulated the radical surface density, obtaining values ranging from 0.36 to 2.83 radicals/nm(2), as determined by UV spectroscopy. Relaxometric measurements showed that both longitudinal (r(1)) and transverse (r(2)) relaxivities were strongly influenced by radical density, reaching maximum values of 5.42 and 11.94 s(-1).mM(-1), respectively, corresponding to enhancements of up to 489% (r(1)) and 712% (r(2)) compared to free 4-amino-TEMPO (at 20 MHz). Interestingly, high surface loading led to a decrease in relaxivity, highlighting the role of spin-spin interactions in modulating the relaxation process. Phantom electron paramagnetic resonance imaging (EPRI) demonstrated improved contrast and resolution for formulations with low radical densities, highlighting the importance of surface engineering to optimize the nanoparticle performance for EPRI applications. Twit Text FOAVip Nitroxide-Modified Silica Nanoparticles: Impact of Radical Density on Relaxometric and EPR Properties ????Langmuir http://www.kidney.de/pget.php?&tw=1&pmid=40642807 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=40642807 #FOAvip English Wikipedia <ref>{{Cite pmid|40642807}}</ref> Nitroxide-Modified Silica Nanoparticles: Impact of Radical Density on Relaxometric and EPR Properties #MMPMID40642807 Ernotte P; Maes A; Garifo S; Drewek I; Frapart YM; Muller RN; Stanicki D; Laurent S Langmuir 2025[Jul]; ä (ä): ä PMID40642807show ga In this study, we report the synthesis and characterization of nitroxide-functionalized silica nanoparticles incorporating a TEMPO-based spin label. These nanoparticles were prepared through a reverse microemulsion method, and the nitroxide moiety was introduced via a TEMPO-modified silane, synthesized by coupling 4-amino-TEMPO with 3-(triethoxysilyl)propylsuccinic anhydride. By adjusting experimental parameters, we successfully modulated the radical surface density, obtaining values ranging from 0.36 to 2.83 radicals/nm(2), as determined by UV spectroscopy. Relaxometric measurements showed that both longitudinal (r(1)) and transverse (r(2)) relaxivities were strongly influenced by radical density, reaching maximum values of 5.42 and 11.94 s(-1).mM(-1), respectively, corresponding to enhancements of up to 489% (r(1)) and 712% (r(2)) compared to free 4-amino-TEMPO (at 20 MHz). Interestingly, high surface loading led to a decrease in relaxivity, highlighting the role of spin-spin interactions in modulating the relaxation process. Phantom electron paramagnetic resonance imaging (EPRI) demonstrated improved contrast and resolution for formulations with low radical densities, highlighting the importance of surface engineering to optimize the nanoparticle performance for EPRI applications. äNitroxide-Modified Silica Nanoparticles: Impact of Radical Density on (epmc).pdf DeepDyve Pubget Overpricing