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Nanoparticules durables pour les applications émergentes
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ISBN10: 6209949320
ISBN13: 9786209949326
Publisher: Editions Notre Savoir
Published: Apr 23 2026
Pages: 60
Weight: 0.21
Height: 0.14 Width: 6.00 Depth: 9.00
Language: French
ISBN13: 9786209949326
Publisher: Editions Notre Savoir
Published: Apr 23 2026
Pages: 60
Weight: 0.21
Height: 0.14 Width: 6.00 Depth: 9.00
Language: French
Ce livre explore la synthèse verte et écologique de nanoparticules d'argent à l'aide d'un extrait de plante, qui contient de l'acide ascorbique agissant à la fois comme agent réducteur et comme agent de fermeture. En ajoutant cet extrait à des solutions de nitrate d'argent, le chercheur a observé un changement de couleur distinct vers le rouge vin après incubation, signalant la formation de nanoparticules par résonance plasmonique de surface. Une caractérisation complète par spectroscopie UV-Vis, diffusion dynamique de la lumière (DLS) et microscopie électronique à transmission (TEM) a confirmé la production de particules d'argent sphériques et nanocristallines de la taille et de la forme souhaitées. La validation structurelle et élémentaire a également été fournie par la diffraction des rayons X (XRD), qui a identifié les facettes standard de l'argent, et par la spectroscopie des rayons X à dispersion d'énergie (EDX), qui a vérifié la composition élémentaire. Enfin, des tests antibactériens utilisant la méthode de diffusion sur disque ont démontré que ces nanoparticules synthétisées biologiquement inhibent efficacement la croissance des bactéries Gram-positives et Gram-négatives, ce qui suggère un potentiel significatif pour des applications futures en médecine, dans les textiles et dans l'électronique de pointe.
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