Highly Luminescent Gold Nanocluster Frameworks

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@article{3d9fd449ace744019caf03e54df6849a,
title = "Highly Luminescent Gold Nanocluster Frameworks",
abstract = "Metal nanoclusters (NCs) are being intensely pursued as prospective luminophores because of their tunable electronic and optical properties. Among the various fluorescent NCs, gold nanoclusters (GNCs) are attractive due to their biocompatibility and excellent photostability, even if so far, they have had limited application potential due to poor quantum yield (QY). In this context, a facile route is demonstrated to tune up the photophysical and photochemical activities of water‐borne luminescent GNCs through the formation of self‐assembled nanocluster superstructures. The approach involves the controlled introduction of Sn2+ ions, directing GNCs from individual particles into 3D spherical gold nanocluster colloidal frameworks (GNCFs). In these, the reduction in the nonemissive relaxation pathways leads to significant enhancement of luminescence signals (QY from ≈3.5{\%} to ≈25{\%}), likely owing to restricted movements of ligands. This approach paves ways for GNCFs as a potent agent for biomedical imaging and therapies, while their high photocatalytic activity is an added advantage",
author = "Sourov Chandra and Nonappa Nonappa and Gr{\'e}gory Beaune and Anirban Som and Shaochen Zhou and Jouko Lahtinen and Hua Jiang and Jaakko Timonen and Olli Ikkala and Robin Ras",
year = "2019",
doi = "10.1002/adom.201900620",
language = "English",
volume = "7",
pages = "1--10",
journal = "ADVANCED OPTICAL MATERIALS",
issn = "2195-1071",
publisher = "John Wiley and Sons Inc.",
number = "20",

}

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TY - JOUR

T1 - Highly Luminescent Gold Nanocluster Frameworks

AU - Chandra, Sourov

AU - Nonappa, Nonappa

AU - Beaune, Grégory

AU - Som, Anirban

AU - Zhou, Shaochen

AU - Lahtinen, Jouko

AU - Jiang, Hua

AU - Timonen, Jaakko

AU - Ikkala, Olli

AU - Ras, Robin

PY - 2019

Y1 - 2019

N2 - Metal nanoclusters (NCs) are being intensely pursued as prospective luminophores because of their tunable electronic and optical properties. Among the various fluorescent NCs, gold nanoclusters (GNCs) are attractive due to their biocompatibility and excellent photostability, even if so far, they have had limited application potential due to poor quantum yield (QY). In this context, a facile route is demonstrated to tune up the photophysical and photochemical activities of water‐borne luminescent GNCs through the formation of self‐assembled nanocluster superstructures. The approach involves the controlled introduction of Sn2+ ions, directing GNCs from individual particles into 3D spherical gold nanocluster colloidal frameworks (GNCFs). In these, the reduction in the nonemissive relaxation pathways leads to significant enhancement of luminescence signals (QY from ≈3.5% to ≈25%), likely owing to restricted movements of ligands. This approach paves ways for GNCFs as a potent agent for biomedical imaging and therapies, while their high photocatalytic activity is an added advantage

AB - Metal nanoclusters (NCs) are being intensely pursued as prospective luminophores because of their tunable electronic and optical properties. Among the various fluorescent NCs, gold nanoclusters (GNCs) are attractive due to their biocompatibility and excellent photostability, even if so far, they have had limited application potential due to poor quantum yield (QY). In this context, a facile route is demonstrated to tune up the photophysical and photochemical activities of water‐borne luminescent GNCs through the formation of self‐assembled nanocluster superstructures. The approach involves the controlled introduction of Sn2+ ions, directing GNCs from individual particles into 3D spherical gold nanocluster colloidal frameworks (GNCFs). In these, the reduction in the nonemissive relaxation pathways leads to significant enhancement of luminescence signals (QY from ≈3.5% to ≈25%), likely owing to restricted movements of ligands. This approach paves ways for GNCFs as a potent agent for biomedical imaging and therapies, while their high photocatalytic activity is an added advantage

U2 - 10.1002/adom.201900620

DO - 10.1002/adom.201900620

M3 - Article

VL - 7

SP - 1

EP - 10

JO - ADVANCED OPTICAL MATERIALS

JF - ADVANCED OPTICAL MATERIALS

SN - 2195-1071

IS - 20

M1 - 1900620

ER -

ID: 36220546