دورية أكاديمية
Thiolated Cyanines Appended to Partially Pegylated Gold Nanoparticles for Fluorescence Quenching of Two-Channel Photothermal Inks.
| العنوان: | Thiolated Cyanines Appended to Partially Pegylated Gold Nanoparticles for Fluorescence Quenching of Two-Channel Photothermal Inks. |
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| المؤلفون: | Pallavicini P; University of Pavia: Universita degli Studi di Pavia, Department of Chemistry, via Taramelli, 12, 27100, PAVIA, ITALY., Colombi C; Università degli Studi di Pavia, Dipartimento di Chimica, ITALY., Baccini C; Università degli Studi di Parma, Department of Chemical, Life and Environmental Sustainability Sciences, ITALY., Gatti B; Università degli Studi di Parma, Department of Chemical, Life and Environmental Sustainability Sciences, ITALY., D'Alfonso L; University of Milano-Bicocca, Departmet of Physics 'G. Occhialini', ITALY., Dacarro G; Università degli Studi di Pavia, Dipartimento di Chimica, ITALY., Cattani S; Università degli Studi di Parma, Department of Chemical, Life and Environmental Sustainability Sciences, ITALY., Diaz Fernandez YA; Università degli Studi di Pavia, Dipartimento di Chimica, ITALY., Doveri L; Università degli Studi di Pavia, Dipartimento di Chimica, ITALY., Milanese C; Università degli Studi di Pavia, Dipartimento di Chimica, ITALY., Secchi A; Università degli Studi di Parma, Department of Chemical, Life and Environmental Sustainability Sciences, ITALY. |
| المصدر: | Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2024 Jun 26, pp. e202400777. Date of Electronic Publication: 2024 Jun 26. |
| Publication Model: | Ahead of Print |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Wiley-VCH Country of Publication: Germany NLM ID: 9513783 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1521-3765 (Electronic) Linking ISSN: 09476539 NLM ISO Abbreviation: Chemistry Subsets: MEDLINE |
| أسماء مطبوعة: | Original Publication: Weinheim, Germany : Wiley-VCH |
| مستخلص: | Following a new approach, we prepared a nanoink with two separate photothermally responsive absorption bands. One is the localized surface plasmon resonance (LSPR) absorption of gold nanoparticles (AuNP, d =17 nm), the second is the absorption band of two cyanine (Cy) dyes, Cy7-C6 or Cy7-C11, grafted to the AuNP surface through thiolated bridges of different lengths: the close proximity to the Au surface induces full quenching of the Cy fluorescence, resulting in thermal relaxation on irradiation. Attempts to full coat AuNP with the lipophilic Cy7-C6 and Cy7-C11 lead to precipitation from aqueous solutions. We thus prepared AuNP with partial pegylation (30, 50, or 70%), using a long chain thiol-terminated PEG bearing a -COOH function. Addition until saturation of either Cy7-C6 or Cy7-C11 to the partially pegylated AuNP gave the AuNP@Cy/PEGX% hybrids (X = 30, 50, 70) that are stable in water and in the water/alcohol mixtures used to prepare the nanoinks. Further overcoating of AuNP@Cy7-C6/PEG50% with PAH (polyallylamine hydrochloride) avoids LSPR hybridization in the dry nanoink printouts, that present two separate bands. When irradiated with laser sources near their absorption maxima, the printouts of the AuNP@Cy7-C6/PEG50%@PAH nanoink respond on two channels, giving different temperature increases depending on the irradiation wavelength. (© 2024 Wiley‐VCH GmbH.) |
| فهرسة مساهمة: | Keywords: cyanine; fluorescence quenching; gold nanoparticles; nanohybrid; photothermal ink |
| تواريخ الأحداث: | Date Created: 20240626 Latest Revision: 20240626 |
| رمز التحديث: | 20240627 |
| DOI: | 10.1002/chem.202400777 |
| PMID: | 38924153 |
| قاعدة البيانات: | MEDLINE |
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