Tuning of Ag Nanoparticle Properties in Cellulose Nanocrystals/Ag Nanoparticle Hybrid Suspensions by H<sub<2</sub<O<sub<2</sub< Redox Post-Treatment: The Role of the H<sub<2</sub<O<sub<2</sub</AgNP Ratio

Hybrid nanoparticles involving 10-nm silver nanoparticles (AgNPs) nucleated on unmodified rod-like cellulose nanocrystals (CNCs) were prepared by chemical reduction. H<sub<2</sub<O<sub<2</sub< used as a post-treatment induced a size-shape transition following a redox mechanis...
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Gespeichert in:

Autor*in:	Dafne Musino [verfasserIn] Camille Rivard [verfasserIn] Bruno Novales [verfasserIn] Gautier Landrot [verfasserIn] Isabelle Capron [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2020

Schlagwörter:	CNC/AgNP hybrids H H oxidation state XANES-EXAFS

Übergeordnetes Werk:	In: Nanomaterials - MDPI AG, 2012, 10(2020), 8, p 1559
Übergeordnetes Werk:	volume:10 ; year:2020 ; number:8, p 1559

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3390/nano10081559

Katalog-ID:	DOAJ072028769

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allfields	10.3390/nano10081559 doi (DE-627)DOAJ072028769 (DE-599)DOAJ7011dd5f2a9646ffbbad5bf089a31140 DE-627 ger DE-627 rakwb eng QD1-999 Dafne Musino verfasserin aut Tuning of Ag Nanoparticle Properties in Cellulose Nanocrystals/Ag Nanoparticle Hybrid Suspensions by H<sub<2</sub<O<sub<2</sub< Redox Post-Treatment: The Role of the H<sub<2</sub<O<sub<2</sub</AgNP Ratio 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Hybrid nanoparticles involving 10-nm silver nanoparticles (AgNPs) nucleated on unmodified rod-like cellulose nanocrystals (CNCs) were prepared by chemical reduction. H<sub<2</sub<O<sub<2</sub< used as a post-treatment induced a size-shape transition following a redox mechanism, passing from 10-nm spherical AgNPs to 300-nm triangular or prismatic NPs (AgNPrisms), where CNCs are the only stabilizers for AgNPs and AgNPrisms. We investigated the role of the H<sub<2</sub<O<sub<2</sub</AgNP mass ratio (α) on AgNPs. At α values above 0.20, the large amount of H<sub<2</sub<O<sub<2</sub< led to extensive oxidation that produced numerous nucleation points for AgNPrisms on CNCs. On the contrary, for α below 0.20, primary AgNPs are only partially oxidized, releasing a reduced amount of Ag<sup<+</sup< ions and thus preventing the formation of AgNPrisms and reforming spherical AgNPs. While XRD and EXAFS reveal that the AgNP fcc crystal structure is unaffected by the H<sub<2</sub<O<sub<2</sub< treatment, the XANES spectra proved that the AgNP–AgNPrism transition is always associated with an increase in the metallic Ag fraction (Ag<sub<0</sub<). In contrast, the formation of new 15-nm spherical AgNPs keeps the initial Ag<sub<0</sub</Ag<sup<+</sup< ratio unmodified. For the first time, we introduce a complete guide map for the fully-controlled preparation of aqueous dispersed AgNPs using CNC as a template. CNC/AgNP hybrids H<sub<2</sub<O<sub<2</sub< redox post-treatment H<sub<2</sub<O<sub<2</sub</AgNP mass ratio oxidation state XANES-EXAFS Chemistry Camille Rivard verfasserin aut Bruno Novales verfasserin aut Gautier Landrot verfasserin aut Isabelle Capron verfasserin aut In Nanomaterials MDPI AG, 2012 10(2020), 8, p 1559 (DE-627)718627199 (DE-600)2662255-5 20794991 nnns volume:10 year:2020 number:8, p 1559 https://doi.org/10.3390/nano10081559 kostenfrei https://doaj.org/article/7011dd5f2a9646ffbbad5bf089a31140 kostenfrei https://www.mdpi.com/2079-4991/10/8/1559 kostenfrei https://doaj.org/toc/2079-4991 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2108 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 10 2020 8, p 1559
spelling	10.3390/nano10081559 doi (DE-627)DOAJ072028769 (DE-599)DOAJ7011dd5f2a9646ffbbad5bf089a31140 DE-627 ger DE-627 rakwb eng QD1-999 Dafne Musino verfasserin aut Tuning of Ag Nanoparticle Properties in Cellulose Nanocrystals/Ag Nanoparticle Hybrid Suspensions by H<sub<2</sub<O<sub<2</sub< Redox Post-Treatment: The Role of the H<sub<2</sub<O<sub<2</sub</AgNP Ratio 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Hybrid nanoparticles involving 10-nm silver nanoparticles (AgNPs) nucleated on unmodified rod-like cellulose nanocrystals (CNCs) were prepared by chemical reduction. H<sub<2</sub<O<sub<2</sub< used as a post-treatment induced a size-shape transition following a redox mechanism, passing from 10-nm spherical AgNPs to 300-nm triangular or prismatic NPs (AgNPrisms), where CNCs are the only stabilizers for AgNPs and AgNPrisms. We investigated the role of the H<sub<2</sub<O<sub<2</sub</AgNP mass ratio (α) on AgNPs. At α values above 0.20, the large amount of H<sub<2</sub<O<sub<2</sub< led to extensive oxidation that produced numerous nucleation points for AgNPrisms on CNCs. On the contrary, for α below 0.20, primary AgNPs are only partially oxidized, releasing a reduced amount of Ag<sup<+</sup< ions and thus preventing the formation of AgNPrisms and reforming spherical AgNPs. While XRD and EXAFS reveal that the AgNP fcc crystal structure is unaffected by the H<sub<2</sub<O<sub<2</sub< treatment, the XANES spectra proved that the AgNP–AgNPrism transition is always associated with an increase in the metallic Ag fraction (Ag<sub<0</sub<). In contrast, the formation of new 15-nm spherical AgNPs keeps the initial Ag<sub<0</sub</Ag<sup<+</sup< ratio unmodified. For the first time, we introduce a complete guide map for the fully-controlled preparation of aqueous dispersed AgNPs using CNC as a template. CNC/AgNP hybrids H<sub<2</sub<O<sub<2</sub< redox post-treatment H<sub<2</sub<O<sub<2</sub</AgNP mass ratio oxidation state XANES-EXAFS Chemistry Camille Rivard verfasserin aut Bruno Novales verfasserin aut Gautier Landrot verfasserin aut Isabelle Capron verfasserin aut In Nanomaterials MDPI AG, 2012 10(2020), 8, p 1559 (DE-627)718627199 (DE-600)2662255-5 20794991 nnns volume:10 year:2020 number:8, p 1559 https://doi.org/10.3390/nano10081559 kostenfrei https://doaj.org/article/7011dd5f2a9646ffbbad5bf089a31140 kostenfrei https://www.mdpi.com/2079-4991/10/8/1559 kostenfrei https://doaj.org/toc/2079-4991 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2108 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 10 2020 8, p 1559
allfields_unstemmed	10.3390/nano10081559 doi (DE-627)DOAJ072028769 (DE-599)DOAJ7011dd5f2a9646ffbbad5bf089a31140 DE-627 ger DE-627 rakwb eng QD1-999 Dafne Musino verfasserin aut Tuning of Ag Nanoparticle Properties in Cellulose Nanocrystals/Ag Nanoparticle Hybrid Suspensions by H<sub<2</sub<O<sub<2</sub< Redox Post-Treatment: The Role of the H<sub<2</sub<O<sub<2</sub</AgNP Ratio 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Hybrid nanoparticles involving 10-nm silver nanoparticles (AgNPs) nucleated on unmodified rod-like cellulose nanocrystals (CNCs) were prepared by chemical reduction. H<sub<2</sub<O<sub<2</sub< used as a post-treatment induced a size-shape transition following a redox mechanism, passing from 10-nm spherical AgNPs to 300-nm triangular or prismatic NPs (AgNPrisms), where CNCs are the only stabilizers for AgNPs and AgNPrisms. We investigated the role of the H<sub<2</sub<O<sub<2</sub</AgNP mass ratio (α) on AgNPs. At α values above 0.20, the large amount of H<sub<2</sub<O<sub<2</sub< led to extensive oxidation that produced numerous nucleation points for AgNPrisms on CNCs. On the contrary, for α below 0.20, primary AgNPs are only partially oxidized, releasing a reduced amount of Ag<sup<+</sup< ions and thus preventing the formation of AgNPrisms and reforming spherical AgNPs. While XRD and EXAFS reveal that the AgNP fcc crystal structure is unaffected by the H<sub<2</sub<O<sub<2</sub< treatment, the XANES spectra proved that the AgNP–AgNPrism transition is always associated with an increase in the metallic Ag fraction (Ag<sub<0</sub<). In contrast, the formation of new 15-nm spherical AgNPs keeps the initial Ag<sub<0</sub</Ag<sup<+</sup< ratio unmodified. For the first time, we introduce a complete guide map for the fully-controlled preparation of aqueous dispersed AgNPs using CNC as a template. CNC/AgNP hybrids H<sub<2</sub<O<sub<2</sub< redox post-treatment H<sub<2</sub<O<sub<2</sub</AgNP mass ratio oxidation state XANES-EXAFS Chemistry Camille Rivard verfasserin aut Bruno Novales verfasserin aut Gautier Landrot verfasserin aut Isabelle Capron verfasserin aut In Nanomaterials MDPI AG, 2012 10(2020), 8, p 1559 (DE-627)718627199 (DE-600)2662255-5 20794991 nnns volume:10 year:2020 number:8, p 1559 https://doi.org/10.3390/nano10081559 kostenfrei https://doaj.org/article/7011dd5f2a9646ffbbad5bf089a31140 kostenfrei https://www.mdpi.com/2079-4991/10/8/1559 kostenfrei https://doaj.org/toc/2079-4991 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2108 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 10 2020 8, p 1559
allfieldsGer	10.3390/nano10081559 doi (DE-627)DOAJ072028769 (DE-599)DOAJ7011dd5f2a9646ffbbad5bf089a31140 DE-627 ger DE-627 rakwb eng QD1-999 Dafne Musino verfasserin aut Tuning of Ag Nanoparticle Properties in Cellulose Nanocrystals/Ag Nanoparticle Hybrid Suspensions by H<sub<2</sub<O<sub<2</sub< Redox Post-Treatment: The Role of the H<sub<2</sub<O<sub<2</sub</AgNP Ratio 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Hybrid nanoparticles involving 10-nm silver nanoparticles (AgNPs) nucleated on unmodified rod-like cellulose nanocrystals (CNCs) were prepared by chemical reduction. H<sub<2</sub<O<sub<2</sub< used as a post-treatment induced a size-shape transition following a redox mechanism, passing from 10-nm spherical AgNPs to 300-nm triangular or prismatic NPs (AgNPrisms), where CNCs are the only stabilizers for AgNPs and AgNPrisms. We investigated the role of the H<sub<2</sub<O<sub<2</sub</AgNP mass ratio (α) on AgNPs. At α values above 0.20, the large amount of H<sub<2</sub<O<sub<2</sub< led to extensive oxidation that produced numerous nucleation points for AgNPrisms on CNCs. On the contrary, for α below 0.20, primary AgNPs are only partially oxidized, releasing a reduced amount of Ag<sup<+</sup< ions and thus preventing the formation of AgNPrisms and reforming spherical AgNPs. While XRD and EXAFS reveal that the AgNP fcc crystal structure is unaffected by the H<sub<2</sub<O<sub<2</sub< treatment, the XANES spectra proved that the AgNP–AgNPrism transition is always associated with an increase in the metallic Ag fraction (Ag<sub<0</sub<). In contrast, the formation of new 15-nm spherical AgNPs keeps the initial Ag<sub<0</sub</Ag<sup<+</sup< ratio unmodified. For the first time, we introduce a complete guide map for the fully-controlled preparation of aqueous dispersed AgNPs using CNC as a template. CNC/AgNP hybrids H<sub<2</sub<O<sub<2</sub< redox post-treatment H<sub<2</sub<O<sub<2</sub</AgNP mass ratio oxidation state XANES-EXAFS Chemistry Camille Rivard verfasserin aut Bruno Novales verfasserin aut Gautier Landrot verfasserin aut Isabelle Capron verfasserin aut In Nanomaterials MDPI AG, 2012 10(2020), 8, p 1559 (DE-627)718627199 (DE-600)2662255-5 20794991 nnns volume:10 year:2020 number:8, p 1559 https://doi.org/10.3390/nano10081559 kostenfrei https://doaj.org/article/7011dd5f2a9646ffbbad5bf089a31140 kostenfrei https://www.mdpi.com/2079-4991/10/8/1559 kostenfrei https://doaj.org/toc/2079-4991 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2108 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 10 2020 8, p 1559
allfieldsSound	10.3390/nano10081559 doi (DE-627)DOAJ072028769 (DE-599)DOAJ7011dd5f2a9646ffbbad5bf089a31140 DE-627 ger DE-627 rakwb eng QD1-999 Dafne Musino verfasserin aut Tuning of Ag Nanoparticle Properties in Cellulose Nanocrystals/Ag Nanoparticle Hybrid Suspensions by H<sub<2</sub<O<sub<2</sub< Redox Post-Treatment: The Role of the H<sub<2</sub<O<sub<2</sub</AgNP Ratio 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Hybrid nanoparticles involving 10-nm silver nanoparticles (AgNPs) nucleated on unmodified rod-like cellulose nanocrystals (CNCs) were prepared by chemical reduction. H<sub<2</sub<O<sub<2</sub< used as a post-treatment induced a size-shape transition following a redox mechanism, passing from 10-nm spherical AgNPs to 300-nm triangular or prismatic NPs (AgNPrisms), where CNCs are the only stabilizers for AgNPs and AgNPrisms. We investigated the role of the H<sub<2</sub<O<sub<2</sub</AgNP mass ratio (α) on AgNPs. At α values above 0.20, the large amount of H<sub<2</sub<O<sub<2</sub< led to extensive oxidation that produced numerous nucleation points for AgNPrisms on CNCs. On the contrary, for α below 0.20, primary AgNPs are only partially oxidized, releasing a reduced amount of Ag<sup<+</sup< ions and thus preventing the formation of AgNPrisms and reforming spherical AgNPs. While XRD and EXAFS reveal that the AgNP fcc crystal structure is unaffected by the H<sub<2</sub<O<sub<2</sub< treatment, the XANES spectra proved that the AgNP–AgNPrism transition is always associated with an increase in the metallic Ag fraction (Ag<sub<0</sub<). In contrast, the formation of new 15-nm spherical AgNPs keeps the initial Ag<sub<0</sub</Ag<sup<+</sup< ratio unmodified. For the first time, we introduce a complete guide map for the fully-controlled preparation of aqueous dispersed AgNPs using CNC as a template. CNC/AgNP hybrids H<sub<2</sub<O<sub<2</sub< redox post-treatment H<sub<2</sub<O<sub<2</sub</AgNP mass ratio oxidation state XANES-EXAFS Chemistry Camille Rivard verfasserin aut Bruno Novales verfasserin aut Gautier Landrot verfasserin aut Isabelle Capron verfasserin aut In Nanomaterials MDPI AG, 2012 10(2020), 8, p 1559 (DE-627)718627199 (DE-600)2662255-5 20794991 nnns volume:10 year:2020 number:8, p 1559 https://doi.org/10.3390/nano10081559 kostenfrei https://doaj.org/article/7011dd5f2a9646ffbbad5bf089a31140 kostenfrei https://www.mdpi.com/2079-4991/10/8/1559 kostenfrei https://doaj.org/toc/2079-4991 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2108 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 10 2020 8, p 1559
language	English
source	In Nanomaterials 10(2020), 8, p 1559 volume:10 year:2020 number:8, p 1559
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topic_facet	CNC/AgNP hybrids H<sub<2</sub<O<sub<2</sub< redox post-treatment H<sub<2</sub<O<sub<2</sub</AgNP mass ratio oxidation state XANES-EXAFS Chemistry
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authorswithroles_txt_mv	Dafne Musino @@aut@@ Camille Rivard @@aut@@ Bruno Novales @@aut@@ Gautier Landrot @@aut@@ Isabelle Capron @@aut@@
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issn	20794991
topic_title	QD1-999 Tuning of Ag Nanoparticle Properties in Cellulose Nanocrystals/Ag Nanoparticle Hybrid Suspensions by H<sub<2</sub<O<sub<2</sub< Redox Post-Treatment: The Role of the H<sub<2</sub<O<sub<2</sub</AgNP Ratio CNC/AgNP hybrids H<sub<2</sub<O<sub<2</sub< redox post-treatment H<sub<2</sub<O<sub<2</sub</AgNP mass ratio oxidation state XANES-EXAFS
topic	misc QD1-999 misc CNC/AgNP hybrids misc H<sub<2</sub<O<sub<2</sub< redox post-treatment misc H<sub<2</sub<O<sub<2</sub</AgNP mass ratio misc oxidation state misc XANES-EXAFS misc Chemistry
topic_unstemmed	misc QD1-999 misc CNC/AgNP hybrids misc H<sub<2</sub<O<sub<2</sub< redox post-treatment misc H<sub<2</sub<O<sub<2</sub</AgNP mass ratio misc oxidation state misc XANES-EXAFS misc Chemistry
topic_browse	misc QD1-999 misc CNC/AgNP hybrids misc H<sub<2</sub<O<sub<2</sub< redox post-treatment misc H<sub<2</sub<O<sub<2</sub</AgNP mass ratio misc oxidation state misc XANES-EXAFS misc Chemistry
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hierarchy_parent_title	Nanomaterials
hierarchy_parent_id	718627199
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title	Tuning of Ag Nanoparticle Properties in Cellulose Nanocrystals/Ag Nanoparticle Hybrid Suspensions by H<sub<2</sub<O<sub<2</sub< Redox Post-Treatment: The Role of the H<sub<2</sub<O<sub<2</sub</AgNP Ratio
ctrlnum	(DE-627)DOAJ072028769 (DE-599)DOAJ7011dd5f2a9646ffbbad5bf089a31140
title_full	Tuning of Ag Nanoparticle Properties in Cellulose Nanocrystals/Ag Nanoparticle Hybrid Suspensions by H<sub<2</sub<O<sub<2</sub< Redox Post-Treatment: The Role of the H<sub<2</sub<O<sub<2</sub</AgNP Ratio
author_sort	Dafne Musino
journal	Nanomaterials
journalStr	Nanomaterials
callnumber-first-code	Q
lang_code	eng
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publishDateSort	2020
contenttype_str_mv	txt
author_browse	Dafne Musino Camille Rivard Bruno Novales Gautier Landrot Isabelle Capron
container_volume	10
class	QD1-999
format_se	Elektronische Aufsätze
author-letter	Dafne Musino
doi_str_mv	10.3390/nano10081559
author2-role	verfasserin
title_sort	tuning of ag nanoparticle properties in cellulose nanocrystals/ag nanoparticle hybrid suspensions by h<sub<2</sub<o<sub<2</sub< redox post-treatment: the role of the h<sub<2</sub<o<sub<2</sub</agnp ratio
callnumber	QD1-999
title_auth	Tuning of Ag Nanoparticle Properties in Cellulose Nanocrystals/Ag Nanoparticle Hybrid Suspensions by H<sub<2</sub<O<sub<2</sub< Redox Post-Treatment: The Role of the H<sub<2</sub<O<sub<2</sub</AgNP Ratio
abstract	Hybrid nanoparticles involving 10-nm silver nanoparticles (AgNPs) nucleated on unmodified rod-like cellulose nanocrystals (CNCs) were prepared by chemical reduction. H<sub<2</sub<O<sub<2</sub< used as a post-treatment induced a size-shape transition following a redox mechanism, passing from 10-nm spherical AgNPs to 300-nm triangular or prismatic NPs (AgNPrisms), where CNCs are the only stabilizers for AgNPs and AgNPrisms. We investigated the role of the H<sub<2</sub<O<sub<2</sub</AgNP mass ratio (α) on AgNPs. At α values above 0.20, the large amount of H<sub<2</sub<O<sub<2</sub< led to extensive oxidation that produced numerous nucleation points for AgNPrisms on CNCs. On the contrary, for α below 0.20, primary AgNPs are only partially oxidized, releasing a reduced amount of Ag<sup<+</sup< ions and thus preventing the formation of AgNPrisms and reforming spherical AgNPs. While XRD and EXAFS reveal that the AgNP fcc crystal structure is unaffected by the H<sub<2</sub<O<sub<2</sub< treatment, the XANES spectra proved that the AgNP–AgNPrism transition is always associated with an increase in the metallic Ag fraction (Ag<sub<0</sub<). In contrast, the formation of new 15-nm spherical AgNPs keeps the initial Ag<sub<0</sub</Ag<sup<+</sup< ratio unmodified. For the first time, we introduce a complete guide map for the fully-controlled preparation of aqueous dispersed AgNPs using CNC as a template.
abstractGer	Hybrid nanoparticles involving 10-nm silver nanoparticles (AgNPs) nucleated on unmodified rod-like cellulose nanocrystals (CNCs) were prepared by chemical reduction. H<sub<2</sub<O<sub<2</sub< used as a post-treatment induced a size-shape transition following a redox mechanism, passing from 10-nm spherical AgNPs to 300-nm triangular or prismatic NPs (AgNPrisms), where CNCs are the only stabilizers for AgNPs and AgNPrisms. We investigated the role of the H<sub<2</sub<O<sub<2</sub</AgNP mass ratio (α) on AgNPs. At α values above 0.20, the large amount of H<sub<2</sub<O<sub<2</sub< led to extensive oxidation that produced numerous nucleation points for AgNPrisms on CNCs. On the contrary, for α below 0.20, primary AgNPs are only partially oxidized, releasing a reduced amount of Ag<sup<+</sup< ions and thus preventing the formation of AgNPrisms and reforming spherical AgNPs. While XRD and EXAFS reveal that the AgNP fcc crystal structure is unaffected by the H<sub<2</sub<O<sub<2</sub< treatment, the XANES spectra proved that the AgNP–AgNPrism transition is always associated with an increase in the metallic Ag fraction (Ag<sub<0</sub<). In contrast, the formation of new 15-nm spherical AgNPs keeps the initial Ag<sub<0</sub</Ag<sup<+</sup< ratio unmodified. For the first time, we introduce a complete guide map for the fully-controlled preparation of aqueous dispersed AgNPs using CNC as a template.
abstract_unstemmed	Hybrid nanoparticles involving 10-nm silver nanoparticles (AgNPs) nucleated on unmodified rod-like cellulose nanocrystals (CNCs) were prepared by chemical reduction. H<sub<2</sub<O<sub<2</sub< used as a post-treatment induced a size-shape transition following a redox mechanism, passing from 10-nm spherical AgNPs to 300-nm triangular or prismatic NPs (AgNPrisms), where CNCs are the only stabilizers for AgNPs and AgNPrisms. We investigated the role of the H<sub<2</sub<O<sub<2</sub</AgNP mass ratio (α) on AgNPs. At α values above 0.20, the large amount of H<sub<2</sub<O<sub<2</sub< led to extensive oxidation that produced numerous nucleation points for AgNPrisms on CNCs. On the contrary, for α below 0.20, primary AgNPs are only partially oxidized, releasing a reduced amount of Ag<sup<+</sup< ions and thus preventing the formation of AgNPrisms and reforming spherical AgNPs. While XRD and EXAFS reveal that the AgNP fcc crystal structure is unaffected by the H<sub<2</sub<O<sub<2</sub< treatment, the XANES spectra proved that the AgNP–AgNPrism transition is always associated with an increase in the metallic Ag fraction (Ag<sub<0</sub<). In contrast, the formation of new 15-nm spherical AgNPs keeps the initial Ag<sub<0</sub</Ag<sup<+</sup< ratio unmodified. For the first time, we introduce a complete guide map for the fully-controlled preparation of aqueous dispersed AgNPs using CNC as a template.
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container_issue	8, p 1559
title_short	Tuning of Ag Nanoparticle Properties in Cellulose Nanocrystals/Ag Nanoparticle Hybrid Suspensions by H<sub<2</sub<O<sub<2</sub< Redox Post-Treatment: The Role of the H<sub<2</sub<O<sub<2</sub</AgNP Ratio
url	https://doi.org/10.3390/nano10081559 https://doaj.org/article/7011dd5f2a9646ffbbad5bf089a31140 https://www.mdpi.com/2079-4991/10/8/1559 https://doaj.org/toc/2079-4991
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author2	Camille Rivard Bruno Novales Gautier Landrot Isabelle Capron
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up_date	2024-07-03T23:24:02.463Z
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