Inorganic and Erythroxylum coca Leaf Extract-Mediated Synthesis of Gold Nanoparticles: A Comparative Study of Size, Surface Chemistry, and Colloidal Stability.
Saved in:
| Title: | Inorganic and Erythroxylum coca Leaf Extract-Mediated Synthesis of Gold Nanoparticles: A Comparative Study of Size, Surface Chemistry, and Colloidal Stability. |
|---|---|
| Authors: | Ramos-Guivar, Juan A.1 (AUTHOR) juan.ramos5@unmsm.edu.pe, Lizana-Segama, Henry Daniel1,2 (AUTHOR), Marcos-Carrillo, Mercedes del Pilar1 (AUTHOR), Checca-Huaman, Noemi-Raquel2 (AUTHOR) |
| Source: | Nanomaterials (2079-4991). Mar2026, Vol. 16 Issue 6, p341. 21p. |
| Subjects: | Gold nanoparticles, Colloidal stability, Biosynthesis, Inorganic synthesis, Surface chemistry, Surface plasmon resonance, Nanoparticle size |
| Abstract: | Gold nanoparticles (AuNPs) were synthesized via two complementary routes, an inorganic surfactant-mediated method and a plant-extract-assisted biosynthesis, to elucidate how synthesis pathways influence nanoparticle physicochemical properties. In the inorganic route, hexadecyltrimethylammonium bromide (CTAB)-stabilized AuNPs were prepared using CTAB dissolution temperatures of 70–90 °C. UV–Vis spectroscopy showed localized surface plasmon resonance (LSPR) bands at 554–556 nm, while dynamic light scattering (DLS) indicated a decrease in hydrodynamic diameter from 110 to 97 nm with increasing dissolution temperature. Zeta potentials above +40 mV indicated strong electrostatic stabilization, and transmission electron microscopy (TEM) revealed ultrasmall Au cores with a narrow size distribution (2.4–3.0 nm) and a face-centered cubic crystal structure. In the biosynthetic route, AuNPs were obtained using aqueous Erythroxylum coca leaf extracts (1–4% w/v). The extracts exhibited a concentration-dependent red shift (~380 to ~420 nm), and biosynthesized AuNPs displayed LSPR bands in the 550–580 nm range. DLS yielded hydrodynamic diameters of 270–390 nm, with pronounced aggregation (3341 nm) at the lowest extract concentration. Under optimized conditions (HC5, n = 5), reproducible plasmonic and colloidal properties were obtained (maximum absorbance, localized surface plasmon resonance wavelength (λmax) = 569.6 ± 1.7 nm; hydrodynamic diameter (DH) = 237.6 ± 24.3 nm; absolute zeta potential (|ζ|)= 32.2 ± 2.6 mV). TEM analysis indicated predominantly quasi-spherical particles with a broader, log-normal size distribution, consistent with extract-mediated growth under heterogeneous organic capping environments. [ABSTRACT FROM AUTHOR] |
| Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
|
Full text is not displayed to guests.
Login for full access.
|
|
| FullText | Links: – Type: pdflink Text: Availability: 1 |
|---|---|
| Header | DbId: egs DbLabel: Engineering Source An: 192622475 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: Inorganic and Erythroxylum coca Leaf Extract-Mediated Synthesis of Gold Nanoparticles: A Comparative Study of Size, Surface Chemistry, and Colloidal Stability. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Ramos-Guivar%2C+Juan+A%2E%22">Ramos-Guivar, Juan A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> juan.ramos5@unmsm.edu.pe</i><br /><searchLink fieldCode="AR" term="%22Lizana-Segama%2C+Henry+Daniel%22">Lizana-Segama, Henry Daniel</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Marcos-Carrillo%2C+Mercedes+del+Pilar%22">Marcos-Carrillo, Mercedes del Pilar</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Checca-Huaman%2C+Noemi-Raquel%22">Checca-Huaman, Noemi-Raquel</searchLink><relatesTo>2</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Mar2026, Vol. 16 Issue 6, p341. 21p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Gold+nanoparticles%22">Gold nanoparticles</searchLink><br /><searchLink fieldCode="DE" term="%22Colloidal+stability%22">Colloidal stability</searchLink><br /><searchLink fieldCode="DE" term="%22Biosynthesis%22">Biosynthesis</searchLink><br /><searchLink fieldCode="DE" term="%22Inorganic+synthesis%22">Inorganic synthesis</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+chemistry%22">Surface chemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+plasmon+resonance%22">Surface plasmon resonance</searchLink><br /><searchLink fieldCode="DE" term="%22Nanoparticle+size%22">Nanoparticle size</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Gold nanoparticles (AuNPs) were synthesized via two complementary routes, an inorganic surfactant-mediated method and a plant-extract-assisted biosynthesis, to elucidate how synthesis pathways influence nanoparticle physicochemical properties. In the inorganic route, hexadecyltrimethylammonium bromide (CTAB)-stabilized AuNPs were prepared using CTAB dissolution temperatures of 70–90 °C. UV–Vis spectroscopy showed localized surface plasmon resonance (LSPR) bands at 554–556 nm, while dynamic light scattering (DLS) indicated a decrease in hydrodynamic diameter from 110 to 97 nm with increasing dissolution temperature. Zeta potentials above +40 mV indicated strong electrostatic stabilization, and transmission electron microscopy (TEM) revealed ultrasmall Au cores with a narrow size distribution (2.4–3.0 nm) and a face-centered cubic crystal structure. In the biosynthetic route, AuNPs were obtained using aqueous Erythroxylum coca leaf extracts (1–4% w/v). The extracts exhibited a concentration-dependent red shift (~380 to ~420 nm), and biosynthesized AuNPs displayed LSPR bands in the 550–580 nm range. DLS yielded hydrodynamic diameters of 270–390 nm, with pronounced aggregation (3341 nm) at the lowest extract concentration. Under optimized conditions (HC5, n = 5), reproducible plasmonic and colloidal properties were obtained (maximum absorbance, localized surface plasmon resonance wavelength (λmax) = 569.6 ± 1.7 nm; hydrodynamic diameter (DH) = 237.6 ± 24.3 nm; absolute zeta potential (|ζ|)= 32.2 ± 2.6 mV). TEM analysis indicated predominantly quasi-spherical particles with a broader, log-normal size distribution, consistent with extract-mediated growth under heterogeneous organic capping environments. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=192622475 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/nano16060341 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 21 StartPage: 341 Subjects: – SubjectFull: Gold nanoparticles Type: general – SubjectFull: Colloidal stability Type: general – SubjectFull: Biosynthesis Type: general – SubjectFull: Inorganic synthesis Type: general – SubjectFull: Surface chemistry Type: general – SubjectFull: Surface plasmon resonance Type: general – SubjectFull: Nanoparticle size Type: general Titles: – TitleFull: Inorganic and Erythroxylum coca Leaf Extract-Mediated Synthesis of Gold Nanoparticles: A Comparative Study of Size, Surface Chemistry, and Colloidal Stability. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Ramos-Guivar, Juan A. – PersonEntity: Name: NameFull: Lizana-Segama, Henry Daniel – PersonEntity: Name: NameFull: Marcos-Carrillo, Mercedes del Pilar – PersonEntity: Name: NameFull: Checca-Huaman, Noemi-Raquel IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 03 Text: Mar2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 20794991 Numbering: – Type: volume Value: 16 – Type: issue Value: 6 Titles: – TitleFull: Nanomaterials (2079-4991) Type: main |
| ResultId | 1 |
