Localized Defects on Copper Sulfide Surface for Enhanced Plasmon Resonance and Water Splitting

Ren, Kaixv; Yin, Pengfei; Zhou, Yuzhu; Cao, Xingzhong; Dong, Cunku; Cui, Lan; Liu, Hui; Du, Xi‐Wen

doi:10.1002/smll.201700867

Cited by 54 publications

(46 citation statements)

References 32 publications

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“…It evidenced that the spiky flower-like morphology of the shell observed by TEM results from the assembly of copper sulfide nanoflakes with a thickness of ~ 3-5 nm having different orientations. Ultrafine copper sulfide nanoparticles such as the ultrathin nanoflakes have received an increasing attention recently as they can produce intense LSPR because of their enhanced number of superficial defects 60. HR-TEM magnified section of the core (Figure 2C) of the nanohybrid confirmed the presence of the iron oxide lattice, as also reported by the corresponding fast Fourier transform (FFT) (Figure 2D) characteristic of a monocrystalline structure which has been indexed with a spinel Fd - ;m cubic phase with a lattice parameter a = 8.396 Å relative to maghemite (JCPDS 00-039-1346) in accordance with the results from XRD (Figure S1).…”

Section: Resultsmentioning

confidence: 99%

Iron Oxide Nanoflowers @ CuS Hybrids for Cancer Tri-Therapy: Interplay of Photothermal Therapy, Magnetic Hyperthermia and Photodynamic Therapy

Curcio¹,

Silva²,

Cabana³

et al. 2019

Theranostics

189

124

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Innovative synthesis routes revolutionized nanomaterial combination and design possibilities resulting in a new generation of fine-tuned nanoparticles featuring exquisite shape and constitution control. However, there is still room for improvement when it comes to the development of multi-functional nanoparticle agents merging a plurality of therapeutic functions to tackle tumors simultaneously by synergic mechanisms. Herein, we report the design of an optimized nanohybrid for cancer tri-therapy featuring a maghemite (γ-Fe2O3) nanoflower-like multicore nanoparticle conceived for efficient magnetic hyperthermia (MHT) and a spiky copper sulfide shell (IONF@CuS) with a high near-infrared (NIR) absorption coefficient suitable for photothermal (PTT) and photodynamic therapy (PDT). Methods: Spiky-like IONF@CuS nanohybrids were obtained through a straightforward and scalable water-based template sacrificial synthesis, which allows the shell shape control by tuning polyvinylpyrrolidone (PVP) concentration. A comprehensive characterization of nanohybrid size, shape and structural properties was carried out by combining complementary TEM, SEM, HR-TEM, EELS, XRD and NTA. The all-in-one therapeutic multi-functionality was assessed on cancer cells and on tumor-bearing nude mice. Results: Tests carried out on IONF@CuS nanohybrid aqueous dispersion demonstrated their impressive efficiency to convert light (conversion coefficient = 42 ± 6 %) and magnetic stimulation (SAR ~ 350 W g -1 ) into heat as well as to induce concurrent reactive oxygen species (ROS) formation upon laser irradiation. Such capabilities were further confirmed in cellular environment by in vitro tests and at the organism level by in vivo tests in a murine tumor model. Notably, complete tumor regression was obtained for the PTT mode at low Cu concentration. Overall, these results allowed determining windows of applicability for each therapy individually or in combination. Conclusions: Altogether, the obtained data evidence the successful synthesis of a unique tri-therapeutic nanoparticle featuring highly relevant assets for clinical translation such as reduced nanoparticle administered dose, reduced laser power exposure, reduced magnetic field frequency, and the possibility of serial heating cycles and therapy monitoring by photoacoustic (PA) and magnetic resonance imaging (MRI). Furthermore, the integration of the dual heating capability (MHT + PTT) with the PDT insult offers a unique asset to tackle tumors by multiple cytotoxic strategies in order to improve the therapeutic outcome in a broader spectrum of clinical conditions.

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Section: Resultsmentioning

confidence: 99%

Iron Oxide Nanoflowers @ CuS Hybrids for Cancer Tri-Therapy: Interplay of Photothermal Therapy, Magnetic Hyperthermia and Photodynamic Therapy

Curcio¹,

Silva²,

Cabana³

et al. 2019

Theranostics

189

124

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“…Ren et al introduced a strategy to control the spatial distribution of the defects in Cu 1.94 S nanoflake arrays so as to reduce charge-carrier recombination sites and consequently realize higher efficiency for photo catalytic water-splitting. [148] In fact, ternary systems like H-TiO 2 / CdS/Cu 2-x S heterostructure are also being pursued to enable wide absorption of solar spectrum by tuning the band-alignment efficiently. [163] Titanium Nitride (TiN): Often considered an alternative to Au, plasmonic TiN nanoparticles are often used in combination with TiO 2 to realize superior photo catalytic activities.…”

Section: Wwwadvancedsciencenewscommentioning

confidence: 99%

Sustainable Nanoplasmon‐Enhanced Photoredox Reactions: Synthesis, Characterization, and Applications

Bhattacharya

Saji

Mohan

et al. 2020

Advanced Energy Materials

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“…The binary Cu‐S system exhibits a phase diagram with abundant phases and is well known for its crystal phase diversity, in which the crystals are composed of many nonstoichiometric components over a wide range. Cu 2 − x S (0 < x < 1) materials arise from copper deficiency and show a strong LSPR effect due to their high free carrier density . By continuously adjusting the composition, the band gap of the modified Zn x Cd 1 − x S solid solution covers the whole range.…”

Section: Design Of Cu‐based Cocatalysts For Photocatalytic Hydrogen Ementioning

confidence: 99%

Recent Advances in Cu‐Based Cocatalysts toward Solar‐to‐Hydrogen Evolution: Categories and Roles

et al. 2019

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Solar-to-hydrogen production is one of the most promising solutions for global energy shortages and the environmental crisis because it utilizes solar energy to the fullest extent. Photocatalytically splitting water to hydrogen involves three crucial processes: solar light harvesting, charge separation/migration, and the catalytic H 2 production reaction. In the past few years, much attention is paid to investigating noble metal cocatalysts for solar photoreduction, but much less attention is paid to transition metal-based cocatalysts. Nevertheless, great and significant advances are achieved using a copperbased cocatalyst for solar-to-hydrogen evolution, as it possesses a suitable binding energy for the hydrogen intermediate according to density functional theory calculations. This review summarizes recent studies and progress on the copper-based cocatalytic materials as well as discusses the roles and functional mechanisms for photocatalytic H 2 evolution. It begins with discussing basic principles for the use of cocatalysts for photocatalytic hydrogen evolution and points out opportunities to use non-noble metal cocatalysts for hydrogen evolution. Then, it explains the construction and structural features of a photocatalysis system with semiconductor-Cu-based cocatalyst, and how the functional mechanisms work to enhance the hydrogenproduction-related reactions. Finally, some challenges and perspectives are also given to promote further exploration of this emerging research area. Usually, the following three parts are considered: 1) improving

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Localized Defects on Copper Sulfide Surface for Enhanced Plasmon Resonance and Water Splitting

Cited by 54 publications

References 32 publications

Iron Oxide Nanoflowers @ CuS Hybrids for Cancer Tri-Therapy: Interplay of Photothermal Therapy, Magnetic Hyperthermia and Photodynamic Therapy

Iron Oxide Nanoflowers @ CuS Hybrids for Cancer Tri-Therapy: Interplay of Photothermal Therapy, Magnetic Hyperthermia and Photodynamic Therapy

Sustainable Nanoplasmon‐Enhanced Photoredox Reactions: Synthesis, Characterization, and Applications

Recent Advances in Cu‐Based Cocatalysts toward Solar‐to‐Hydrogen Evolution: Categories and Roles

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