ACS Applied Materials & Interfaces
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2016
·
IF 7.145
Tianyu Li,Feng Li,Wentian Xiang,Yu Yi,Yuyan Chen,Liang Cheng,Zhuang Liu,Huaping Xu
Selenium has attracted increasing interest in recent decades because of the function of regulating the redox balance in the human body. However, biomedical studies of selenium are still limited. Gold nanoparticles (AuNPs), typically prepared by a first reduction step followed by a second stabilization step, are widely applied in biomedical studies. However, their own anticancer activity is less studied. Here, we report 2 nm AuNPs with significant anticancer activity (IC50 = 20 μM) that is stabilized by a selenium-containing amphiphile EGSe-tMe. The AuNPs are prepared by simply mixing chloroauric acid (HAuCl4) with EGSe-tMe, which acts as both a reducing agent and a stabilizer. In contrast to AuNPs prepared by EGSe-tMe, EGSe-tMe alone and typically prepared AuNPs show little anticancer activity even at concentrations up to 250 μM. Mechanistic studies suggest that selenium in cooperation with AuNPs can induce high concentrations of reactive oxygen species (ROS) in cancer cells, leading to cellular apoptosis.
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高影响因子
CHEMISTRY OF MATERIALS
·
2016
·
IF 9.407
Jie Fu,Qingwen Tian,Zhengji Zhou,Dongxing Kou,Yuena Meng,Wenhui Zhou,Sixin Wu
Additional elements in the Cu2ZnSn(S,Se)4 (CZTSSe) absorber layers can play a crucial role in improving the performance of thin film solar cells. In this paper, a significant performance enhancement of CZTSSe thin film solar cells was achieved by the partial substitution of the Zn2+ cation with Cd2+. A small amount of Cd2+ can be successfully incorporated into the host lattice of CZTSSe to form a homogeneous Cu2Zn1–xCdxSn(S,Se)4 (CZCTSSe) alloy material. We demonstrated that the crystal growth and the band gap of CZCTSSe thin films are affected by the Cd doping level. Additionally, the impact of Cd content on the space-charge density (Nc-v) and the depletion width (Wd) of CZCTSSe solar cells was systematically investigated. By this cation substitution approach, the power conversion efficiency of the solar cells based on the CZCTSSe absorber was successfully increased from 5.41 to 8.11% for the optimal composition (x = 5%).
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2016
·Vol. 163
·期 10
·B533
·
IF 3.014
Sheying Dong,Miao Li,Dandan Zhang,Liang Zhang,Guo Zhang
Rod-like Sb2Se3 material prepared by a simple hydrothermal method was dispersed with ionic liquid (IL) to construct Sb2Se3/IL/GOx-CPE and Sb2Se3/IL/Cyt c -CPE for the detection of glucose and nitrate (NO2−), respectively. Especially, the effect of preparation condition like reaction time on electrochemistry performance was discussed. The proposed biosensor showed excellent performances with wide linear range of 8–1700 μM and the detection limit of 2.0 μM for glucose, and 5–5300 μM and 1.2 μM for NO2−, respectively. Moreover, in the chain-type crystal structure of Sb2Se3, strong covalent bond along the c crystallographic axis and much weaker van der Waals bonding between the chains of the layered structure were existed, which facilitated the formation of rod-like Sb2Se3. This was why the rod-like Sb2Se3 could be used to immobilize GOx and Cyt c. With those remarkable advantages such as low cost, satisfactory reproducibility, stability and reliability, the V-VI binary chalcogenides such as rod-like Sb2Se3 material could be an option sensing platform for the extensive application of biosensors.
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MATERIALS RESEARCH BULLETIN
·
2016
·
IF 2.435
Xiaowei Li,Ruixue Chen,Huidong Sui,Xiaoxian Yuan,Meng Li,Kun Yang,Ling Li,Wenming Zhang,Yucang Zhang
Flower-like NiO nanoparticles was successfully synthetized by homogeneous precipitation. A novelty modified (CH 3 ) 4 N) 2 S/((CH 3 ) 4 N) 2 S n electrolyte was introduced in solar cell successfully and NiS was used as the counter electrode. Moreover, CdSe sensitized p-type NiO was synthesized by chemical bath deposition (CBD) in a precursor solution to ensure the nanosized flower-like NiO films obtain a better uniformity and high penetration. Meanwhile, a series of parallel experiment were designed to investigate the effect of different CdSe deposition layers on the photoelectric characteristic of the cell. The result showed that when the film was eight layers, the maximum efficiency of 1.06% had been achieved, with a significantly open circuit voltage ( V oc ) of 0.755 V, a fill factor (ff) of 0.27% and a short circuit current density ( J sc ) of 5.21 mA cm −2 .
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CRYSTENGCOMM
·
2016
·Vol. 18
·期 36
·6860-6866
·
IF 3.849
Hui Liu,Jiaxin Zhang,Xuerong Zheng,Gang Liu,Huilin Hu,Wenli Pan,Caichi Liu,Qiuyan Hao,Hongjian Chen
A mixed solvent of monoethanolamine and thioglycolic acid is successfully used to dissolve Se powder to prepare a highly reactive and soluble Se solution at room temperature in air. The as-prepared Se solution is very stable for more than half a year without any observed precipitation even in air. We used the Se precursor solution to synthesize various metal selenide nanomaterials such as Sb2Se3 nanorods, CuSe nanoplates and CuInSe2 nanocrystals by using a facile and environmentally-friendly triethylene glycol process. The structure, morphology, chemical composition and optical properties of the synthesized metal selenide nanomaterials are characterized. Moreover, the CuInSe2 nanocrystals are used to prepare ethanol-based colloidal ink and then deposited thin films by a dip-coating process. The synthesized CuInSe2 nanocrystal thin films are annealed at 550 °C in a selenizing atmosphere. A power conversion efficiency of 2.65% has been achieved by using the CuInSe2 thin films after selenization as a light-absorbing layer under AM 1.5 illumination.
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Nanoscale
·
2017
·Vol. 9
·期 39
·15044-15055
·
IF 7.367
Dong Li,Guanjie Xing,Shilin Tang,Xiaohong Li,Louzhen Fan,Yunchao Li
We report herein a heat-triggered precursor slow releasing route for the one-pot synthesis of ultrathin ZnSe nanowires (NWs), which relies on the gradual dissolving of Se powder into oleylamine containing a soluble Zn precursor under heating. This route allows the reaction system to maintain a high monomer concentration throughout the entire reaction process, thus enabling the generation of ZnSe NWs with diameter down to 2.1 nm and length approaching 400 nm. The size-dependent optical properties and band-edge energy levels of the ZnSe NWs were then explored in depth by UV-visible spectroscopy and cyclic voltammetry, respectively. Considering their unique absorption properties, these NWs were specially utilized for fabricating photoelectrochemical-type photodetectors (PDs). Impressively, the PDs based on the ZnSe NWs with diameters of 2.1 and 4.5 nm exhibited excellent responses to UVA and near-visible light, respectively: both possessed ultrahigh on/off ratios (5150 for UVA and 4213 for near-visible light) and ultrawide linear response ranges (from 2.0 to 9000 μW cm−2 for UVA and 5.0 to 8000 μW cm−2 for near-visible light). Furthermore, these ZnSe NWs were selectively doped with various amounts of Mn2+ to tune their emission properties. As a result, ZnSe NW film-based photochromic cards were creatively developed for visually detecting UVA and near-visible radiation.
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ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Shaobo Ji,Fuqiang Fan,Chenxing Sun,Ying Yu,Huaping Xu
Plasticity of thermoset polymers has been realized by introducing exchangeable bonds, and the plasticity is mostly triggered via heat or UV light. Visible light is a relatively mild trigger that has not been used to induce plasticity in polymer materials. Herein, thermoset polyurethanes (PUs) containing diselenide bonds are fabricated that possess visible light-induced plasticity along with shape memory behavior. A series of PUs with different diselenide bond contents were tested and their shape memory properties and plasticity varied. With a higher diselenide bond content, both shape memory and light-induced plasticity are achieved. By combining these two properties, reshaping the permanent shapes of the PUs is easier. Compared with heat or UV light, visible light has the advantage of spatial control. For instance, a pattern of visible light was introduced by a commercial projector to demonstrate facile reshaping of the materials. Because visible light can be introduced via various methods, PUs with visible light-induced plasticity have great potential applications.
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高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Baoshan He
A novel 3D heterostructure of carbon aerogel nanospheres embedded in ultrathin MoSe 2 nanoslices is synthesized by a simple method. The morphologies and structure of obtained sample are thorough characterized. Benefiting from the peculiar cross-connected nanostructure , the MoSe 2 nanoslices-carbon aerogel nanospheres hybrids exhibit high specific capacity of 775.3 C g −1 and good cycling stability (keeping 98% of initial specific capacity) after 1500 cycles at 1 A g −1 in 6 mol L −1 KOH, demonstrating hierarchical MoSe 2 nanosheets-carbon aerogel nanospheres hybrids are the high-performance supercapacitor electrode material . Furthermore, the as-prepared materials show an enhanced performance toward the electrochemical sensing of endocrine disruptors 17β-estradiol with a linear range of 0.005–5 nmol L −1 and a detection limit as low as 2.0 × 10 −13 mol L −1 (signal to noise of 3). The encouraging results herein ensure the merits of cross-connected nanostructure. Furthermore, it is beyond all doubt that this work provides a promising preparation strategy to develop transition metal selenides based nano-architecture for energy storage and electrochemical sensing.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Zhi-Qiang Zhou,Ren Yan,Jie Zhao,Li-Yun Yang,Ji-Lei Chen,Yan-Jun Hu,Feng-Lei Jiang,Yi Liu
The pollution of Hg 2+ is one of the most serious problems to human health due to their high toxicity, mobility, difficulty in degradation and ability of accumulation in ecological systems. Thus, it is of great importance to develop highly selective and sensitive probe for detecting Hg 2+ in aquatic ecosystems. Here we propose a new turn-on strategy for specific recognition and detection of Hg 2+ . Mn-doped ZnSe quantum dots (QDs) with small size (2.1 nm) were prepared and adopted as probe, the small size of doped QDs makes the replacement of Mn 2+ by Hg 2+ accessible, which eliminates the fluorescence quenching effect of superficial Mn 2+ on Mn-doped ZnSe QDs. Different from traditional semiconductor nanocrystals based turn-off probe for detecting Hg 2+ , we realize a turn-on strategy for the selective detection of Hg 2+ by Hg 2+ -Mn 2+ replacement using semiconductor nanocrystals (Mn-doped ZnSe QDs). This turn-on mechanism was verified by fluorescence spectra, ICP-AES and XPS. In the absence of Hg 2+ , Mn-doped ZnSe QDs possessed low fluorescence intensity. With the addition of Hg 2+ , the fluorescence intensity around 600 nm increased dramatically. Our Mn-doped ZnSe QDs exhibits excellent selectivity and sensitivity for Hg 2+ . The limit of detection is 7.0 nM, which is lower than the mercury toxic level defined by the U.S. Environmental Protection Agency (10 nM). The result of Hg 2+ detection in real samples indicates the feasibility and sensitivity of our probe for application in environmental samples.
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ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Weibin Guo,Yuanzhi Chen,Laisen Wang,Jin Xu,Deqian Zeng,Dong-Liang Peng
MoSe 2 represents an important layered transition metal dichalcogenides (LTMDs) that have high electrocatalytic activity in hydrogen evolution reaction (HER). A key issue to achieve excellent electrochemical properties of MoSe 2 is to synthesize nanostructures that are composed of few-layer MoSe 2 with maximized exposure of active edge sites. In this study, we report the synthesis of MoSe 2 nanostructures with network-like and flower-like morphologies via an organic solution approach that utilizes molybdenum hexacarbonyl as Mo precursor and Se powders as Se source. The prepared MoSe 2 nanostructures consist of few-layer ultrathin nanosheets which can have different orientations. Depending on the volume ratio of oleylamine to oleic acid , the arrangement of ultrathin MoSe 2 nanosheets is adjustable and can form porous network-like or discrete flower-like nanostructure which has large specific surface area and a wealth of exposed edge sites. Excellent HER activities with low overpotentials, small Tafel slopes and long-term durability are observed on the as-synthesized MoSe 2 nanostructures. The acetic acid-washing step that may effectively remove the organic molecules capped on MoSe 2 surfaces is also found to be efficient in improving the HER activity of the synthesized MoSe 2 nanostructures.
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CHEMISTRY OF MATERIALS
·
2017
·
IF 9.466
Shu-Fang Li,Xiao-Ming Jiang,Bin-Wen Liu,Dong Yan,Chen-Sheng Lin,Hui-Yi Zeng,Guo-Cong Guo
Developing excellent infrared nonlinear optical (NLO) materials is challenging because of the incompatibility between a large second harmonic generation (SHG) efficiency and a high laser-induced damage threshold (LIDT). Here, we report three NLO chalcogenides, namely, Na2In4SSe6 (1), NaGaIn2Se5 (2), and NaIn3Se5 (3), whose crystal structures consist of supertetrahedral, superpentahedral, and superoctahedral chalcogenide clusters. Importantly, they exhibit SHG responses 7.0-, 2.1-, and 0.3-fold larger than and LIDTs 5.8-, 6.4-, and 10.7-fold higher than those of AgGaS2, respectively, almost achieving balance between large SHG efficiencies and high LIDTs. Theoretical calculations and structural analysis reveal that the enhanced SHG responses can be attributed to the superpolyhedral chalcogenide clusters. The high LIDTs can be ascribed to their small thermal expansion anisotropy. These findings may provide useful insights into the development of infrared NLO materials with superpolyhedron-built structures.
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2016
·Vol. 21
·期 3
·793-801
·
IF 2.327
Dong Sheying,Li Miao,Wei Wenbo,Liu Dan,Huang Tinglin
A substantial outstanding challenge in diagnostics and disease monitoring is the ability to assay rapidly and conveniently for protein biomarkers within complex biological media. Bi 2 Se 3 , as an important topological insulator (TI) material, was synthesized by a solvothermal method and characterized structurally. Subsequently, the composite of Bi 2 Se 3 and ionic liquid ([BMIm]BF 4 IL) was used as a sensing interface to cross-link goat anti-human immunoglobulin G (anti-IgG) via glutaraldehyde (GA) to fabricate an Bi 2 Se 3 /IL/GA/anti-IgG-carbon paste electrode (CPE). The nonspecific binding sites were enclosed with bovine serum albumin (BSA) to develop a label-free IgG immunosensor. The result showed that the proposed label-free IgG immunosensor exhibited high specificity with a detection limit of 0.8 ng mL −1 and linear range from 2 to 300, and 300 to 2200 ng mL −1 . Besides, the immunosensor exhibited high specificity for IgG detection, acceptable reproducibility, and stability. Thus, the strategy reported here paved a simple way to design a sensitive and cost-effective sensing platform for extension to other disease biomarkers.
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