20563-00-2Relevant articles and documents
Surface plasmon resonance enhanced light absorption and photothermal therapy in the second near-infrared window
Ding, Xianguang,Liow, Chi Hao,Zhang, Mengxin,Huang, Renjun,Li, Chunyan,Shen, He,Liu, Mengya,Zou, Yu,Gao, Nan,Zhang, Zhijun,Li, Yonggang,Wang, Qiangbin,Li, Shuzhou,Jiang, Jiang
, p. 15684 - 15693 (2014)
Enhanced near-field at noble metal nanoparticle surfaces due to localized surface plasmon resonance (LSPR) has been researched in fields ranging from biomedical to photoelectrical applications. However, it is rarely explored on nonmetallic nanomaterials discovered in recent years, which can also support LSPR by doping-induced free charge carriers, let alone the investigation of an intricate system involving both. Here we construct a dual plasmonic hybrid nanosystem Au-Cu9S5 with well controlled interfaces to study the coupling effect of LSPR originating from the collective electron and hole oscillations. Cu9S5 LSPR is enhanced by 50% in the presence of Au, and the simulation results confirm the coupling effect and the enhanced local field as well as the optical power absorption on Cu9S5 surface. This enhanced optical absorption cross section, high photothermal transduction efficiency (37%), large light penetration depth at 1064 nm, excellent X-ray attenuation ability, and low cytotoxicity enable Au-Cu9S5 hybrids for robust photothermal therapy in the second near-infrared (NIR) window with low nanomaterial dose and laser flux, making them potential theranostic nanomaterials with X-ray CT imaging capability. This study will benefit future design and optimization of photoabsorbers and photothermal nanoheaters utilizing surface plasmon resonance enhancement phenomena for a broad range of applications.
Spink
, p. 441 (1949)
Koenig, A. E.
, p. 951 - 951 (1914)
Facile solution-phase synthesis of CuInSe2 nanocrystals with controlled morphologies
Bai, Tianyu,Li, Feifei,Huang, He,Wang, Zhaorui,Shi, Zhan,Li, Chunguang,Wang, Ge,Feng, Shouhua
, p. 5906 - 5910 (2013)
The morphology of CuInSe2 nanocrystals plays a key role in their functional properties. Achieving controllable morphology is significant for studying their structures and novel properties. Here, CuInSe2 nanocrystals with a trigonal-pyramidal shape have successfully been synthesized by a facile solution-phase method. The nanocrystals were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS), etc. The morphological evolution of the CuInSe2 nanocrystals was illustrated by tuning the injection temperature of oleylamine-selenium (OAm-Se). In addition, CuInSe2 nanocrystals with spherical and ellipsoidal shapes were also obtained when copper stearate was used as the copper precursor. CuInSe2 nanocrystals with a trigonal-pyramidal shape were successfully synthesized by a facile solution-phase route. When copper stearate was used as the precursor, a spherical shape was obtained, and this further evolved into an ellipsoid by tuning the concentration of oleylamine. The results demonstrate that precise control of the morphology of CuInSe2 nanocrystals can be achieved.
Ligand chain length conveys thermochromism
Ganguly, Mainak,Panigrahi, Sudipa,Chandrakumar,Sasmal, Anup Kumar,Pal, Anjali,Pal, Tarasankar
, p. 11624 - 11636 (2014)
Thermochromic properties of a series of non-ionic copper compounds have been reported. Herein, we demonstrate that Cu(ii) ion with straight-chain primary amine (A) and alpha-linolenic (fatty acid, AL) co-jointly exhibit thermochromic properties. In the current case, we determined that thermochromism becomes ligand chain length-dependent and at least one of the ligands (A or AL) must be long chain. Thermochromism is attributed to a balanced competition between the fatty acids and amines for the copper(ii) centre. The structure-property relationship of the non-ionic copper compounds Cu(AL) 2(A)2 has been substantiated by various physical measurements along with detailed theoretical studies based on time-dependent density functional theory. It is presumed from our results that the compound would be a useful material for temperature-sensor applications. This journal is the Partner Organisations 2014.
Tailoring Catalytic Properties of Copper Manganese Oxide Nanoparticles (Hopcalites-2G) via Flame Spray Pyrolysis
Wegner, Karl,Medicus, Maximilian,Schade, Elke,Grothe, Julia,Kaskel, Stefan
, p. 3914 - 3922 (2018)
Humidity tolerant copper manganese oxide catalysts of the second generation (“Hopcalites-2G”) were produced by flame spray pyrolysis process (FSP) and their catalytic activity for carbon monoxide oxidation under dry and humid conditions was evaluated. The effects of synthesis parameters such as flame specific variables (OFR=oxygen to fuel ratio, sheath gas, reactor) and the precursor specifications (composition, concentration, solvent) were investigated systematically. From the findings of the synthesis variations, it was possible to identify key factors decisive to achieve a high catalytic activity for CO oxidation under humid conditions. The most important characteristics are phase composition, specific surface area and the carbon content to achieve increased long-term stability of the flame made catalysts under humid conditions. A high productivity in the flame-based Hopcalite synthesis was achieved with catalysts performances similar or better than that of the commercial Hopcalite catalyst Carulite 300 (CARUS). The most active catalyst showed 50 % higher CO conversion after one hour on stream at 50 °C and humid conditions compared with the reference. The latter is a crucial step towards an improved humidity tolerance of Hopcalite catalysts in respiratory filter applications.
P-type Cu7Te5 single-crystalline nanocuboids: Size-controlled synthesis and large-scale self-assembly
Dai, Baosong,Zhao, Qian,Gui, Jing,Zhang, Jiatao,Zhu, Hesun
, p. 9441 - 9445 (2014)
Cu7Te5 single-crystalline nanocuboids have been synthesized by a low-temperature solvothermal strategy, using environmentally friendly chemicals. The size, from nanometer to sub-micrometer, was controlled by adjusting the dodecanethiol (DDT) concentration. Through DDT capping, which induced appropriate van der Waals interactions, the alignment of the nanocuboids led to large-scale self-assembly of superstructures or supracrystals. The UV-vis-NIR spectra of the as-prepared nanocuboid colloid exhibited potential LSPR properties. Measurement of the Mott-Schottky impedance potential curve confirmed the p-type conductivity of the as-prepared Cu7Te5 nanocuboids. This journal is
