- Atomically Conformal Metal Laminations on Plasmonic Nanocrystals for Efficient Catalysis
-
Despite the enormous application potential, methods for conformal few-atomic-layer deposition on colloidal nanocrystals (NCs) are scarce. Similar to the process of lamination, we introduce a confine and shine strategy to homogeneously modify the different surface curvatures of plasmonic NCs with ultrathin conformal layers of diverse catalytic noble metals. This self-limited epitaxial skinlike metal growth harvests the localized surface plasmon resonance to induce reduction chemistry directly on the NC surface, confined inside hollow silica. This strategy avoids any kinetic anisotropic metal deposition. Unlike the conventional thick, anisotropic, and dendritic shells, which show severe nonradiative damping, the skinlike metal lamination preserves the key plasmonic properties of the core NCs. Consequently, the plasmonic-catalytic hybrid nanoreactors can carry out a variety of organic reactions with impressive rates.
- Acharya, Anubhab,Cho, Yoon-Kyoung,Dubbu, Sateesh,Kim, Yeseul,Kumar, Amit,Kumar, Sumit,Kumari, Nitee,Kwon, Taewan,Lee, In Su,Oh, Sang Ho,Park, Junbeom,Rho, Junsuk,So, Sunae,Wang, Zhipeng
-
-
Read Online
- Rhodamine-based fluorogenic probe for imaging biological thiol
-
We have developed a new fluorescent probe for biological thiol. The probe was synthesized by the modification of the 2,4-dinitrobenzenesulfonyl group with rhodamine 110. The selective detection of thiol species such as cysteine or glutathione was achieved in biological conditions. Moreover, the probe was successfully applied to the imaging of thiol species in living human cells.
- Shibata, Aya,Furukawa, Kazuhiro,Abe, Hiroshi,Tsuneda, Satoshi,Ito, Yoshihiro
-
-
Read Online
- Triarylmethane Fluorophores Resistant to Oxidative Photobluing
-
Spectral stability of small-molecule fluorescent probes is required for correct interpretation and reproducibility of multicolor fluorescence imaging data, in particular under high (de)excitation light intensities of super-resolution imaging or in single-molecule applications. We propose a synthetic approach to a series of spectrally stable rhodamine fluorophores based on sequential Ru- and Cu-catalyzed transformations, evaluate their stability against photobleaching and photoconversion in the context of other fluorophores using chemometric analysis, and demonstrate chemical reactivity of fluorophore photoproducts. The substitution patterns providing the photoconversion-resistant triarylmethane fluorophores have been identified, and the applicability of nonbluing labels in live-cell STED nanoscopy is demonstrated.
- Butkevich, Alexey N.,Bossi, Mariano L.,Lukinavi?ius, Gra?vydas,Hell, Stefan W.
-
supporting information
p. 981 - 989
(2019/01/23)
-