Search results for: Xueqin An

Items from 1 to 20 out of 64 results

article

Easy synthesis of highly fluorescent carbon dots from albumin and their photoluminescent mechanism and biological imaging applications

Xiaohua Hu, Xueqin An, Lielie Li

Materials Science and Engineering: C > 2016 > 58 > C > 730-736

A simple and green approach was developed to synthesize highly fluorescent carbon dots (CDs) using albumin as a carbon source in aqueous solution at room temperature. The CDs were characterized by excellent monodispersion, superior photostability, pH-independent emission, long fluorescence lifetime and high quantum yield (QY). The photoluminescent (PL) mechanism of CDs was explored by means of time-resolved...

article

Folate-polydiacetylene-liposome for tumor targeted drug delivery and fluorescent tracing

Lielie Li, Xueqin An, Xiaojuan Yan

Colloids and Surfaces B: Biointerfaces > 2015 > 134 > Complete > 235-239

A novel folate-polydiacetylene-liposome (FP-PL) with both targeted drug delivery and fluorescence tracing was prepared by thin film rehydration method. The simulated drug delivery was performed in Bcap-37 breast cancer cells and Hs578Bst normal cells in vitro. The internalization and distribution of FP-PLs in the cells were presented by fluorescence cell imaging. The results show that the FP-PLs possess...

article

White light emitting ternary quantum dots phosphors with controllable chromaticity and fluorescence resonance energy transfer

Sisheng Cao, Xueqin An

Materials Letters > 2015 > 155 > C > 118-120

A facile route to produce ternary single nanophosphors with white light is reported. This phosphor combines emission from CdS quantum dots in blue with organic dyes calcein in green and rhodamine B in orange. The chromaticity can be tailored precisely by adjusting the molar ratio of quantum dots to dyes. The phosphors are able to generate a pure white light with CIE coordinate of (x=0.33, y=0.34)...

article

Silver nanoparticles synthesis using H2 as reducing agent in toluene–supercritical CO2 microemulsion

Liang Lu, Xueqin An

The Journal of Supercritical Fluids > 2015 > 99 > Complete > 29-37

A new technique to synthesize silver nanoparticles (AgNPs) with controllable size was developed using hydrogen as reducing agent in toluene–supercritical carbon dioxide (toluene–scCO ₂ , the mixture ratio of toluene:CO ₂ is about 20%, v/v) microemulsion. The method involves both process of AgNPs formation (nucleation and crystal growth) at high pressure and thermal incubation at ordinary...

article

Controllable release from magnetoliposomes by magnetic stimulation and thermal stimulation

Dan Qiu, Xueqin An

Colloids and Surfaces B: Biointerfaces > 2013 > 104 > Complete > 326-329

Liposomes with superparamagnetic iron oxide nanoparticles embedded in membrane were prepared by the supercritical carbon dioxide (scCO ₂ ) method. The cargos can be released from liposomes by both triggered agents, temperature and alternating current electromagnetic field (AMF). The release mechanism was explained from the view of microstructure change investigated by fluorescence probe method...

article

An improved method for ratiometric fluorescence detection of pH and Cd2+ using fluorescein isothiocyanate–quantum dots conjugates

Rijun Gui, Xueqin An, Wenxue Huang

Analytica Chimica Acta > 2013 > 767 > Complete > 134-140

In this study, thioglycolic acid capped-CdTe quantum dots (QDs) were modified by polyethylenimine (PEI), and then combined with fluorescein isothiocyanate (FITC) to fabricate FITC–CdTe conjugates. The self-assembly of FITC, CdTe and PEI was ascribed to electrostatic interactions in aqueous solution. The resulting conjugates were developed toward two routes. In route one, ratiometric photoluminescence...

article

Diels‐Alder Reaction in microemulsions with ionic liquid

Huihong Lü, Xueqin An, Jianguo Yu, Xingfu Song

Journal of Physical Organic Chemistry > 25 > 12 > 1210 - 1216

The Diels‐Alder Reaction (DAR) between N‐ethylmaleimide and 2,3‐dimethyl‐1,3‐butadiene was studied in microemulsions with ionic liquid (IL) for the first time. The apparent second‐order rate constants were determined by spectrophotometry in the microemulsion. The effect of solvent on the DAR rate was investigated and interpreted. The experimental results showed that the reaction rate in the microemulsion...

article

Thermosensitive, reversible luminescence properties and bright fluorescence imaging of water-soluble quantum dots/microgels nanocompounds

Rijun Gui, Xueqin An, Jun Gong, Tao Chen

Materials Letters > 2012 > 88 > Complete > 122-125

At room temperature, the self-assembly of CdTe/ZnS quantum dots (QDs)/poly(N-isopropylmethacylamide-co- methylacrylic acid) [QDs/P(NIPAM–MAA)] hybrid microgels were achieved. The temperature-dependent swelling and shrinking behavior of polymer microgels played an important role in the photoluminescence (PL) changes of hybrid microgels. At 25°C, polyethylenimine modified-QDs and P(NIPAM–MAA) microgels...

article

Temperature-dependent stability and DPPH scavenging activity of liposomal curcumin at pH 7.0

Yumeng Niu, Dan Ke, Qianqian Yang, Xiaoyong Wang, more

Food Chemistry > 2012 > 135 > 3 > 1377-1382

This paper investigated the influences of temperature on the stability and 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity of curcumin encapsulated in liposome at pH 7.0. Liposomal curcumin showed higher stability and DPPH scavenging activity than free curcumin at 25°C. When temperature increased from 25 to 80°C, liposomal curcumin degraded more pronouncedly above the phase transition...

article

Comparative study on the interactions of cationic gemini and single-chain surfactant micelles with curcumin

Zizhen Wan, Dan Ke, Jinxiang Hong, Qianping Ran, more

Colloids and Surfaces A: Physicochemical and Engineering Aspects > 2012 > 414 > Complete > 267-273

The interactions of curcumin with cationic micelles of gemini surfactant trimethylene-1,3-bis-(dodecyldimethyl ammonium bromide) (C ₁₂ C ₃ C ₁₂ Br ₂ ) and single-chain surfactant dodecyltrimethylammonium bromide (DTAB) were investigated. At pH 13, the trianionic curcumin (Cur ³⁻ ) had rapid degradation to about 21.5% with an observed rate constant (k _obs...

article

The liquid–liquid coexistence curves of {benzonitrile+n-pentadecane} and {benzonitrile+n-heptadecane} in the critical region

Zhiyun Chen, Yongliang Bai, Tianxiang Yin, Xueqin An, more

The Journal of Chemical Thermodynamics > 2012 > 54 > Complete > 438-443

Liquid+liquid coexistence curves for the binary solutions of {benzonitrile+n-pentadecane} and {benzonitrile+n-heptadecane} have been measured in the critical region. The critical exponent β and the critical amplitudes have been deduced and the former is consistent with the theoretic prediction. It was found that the coexistence curves may be well described by the crossover model proposed by Gutkowski...

article

Critical behavior of binary mixture of {(1−x) C6H5CN+x CH3(CH2)9CH3}: Measurements of coexistence curves, turbidity, and heat capacity

Tianxiang Yin, Yuntao Lei, Chunfeng Mao, Zhiyun Chen, more

The Journal of Chemical Thermodynamics > 2012 > 53 > Complete > 42-51

(Liquid+liquid) coexistence curve, turbidity, and isobaric heat capacity per unit volume for the critical solution of {benzonitrile+n-undecane} have been measured. The critical exponents β, ν, γ, and α have been deduced, which were found to be consistent with the theoretic predictions. Meanwhile, the experimental data have also been analyzed to obtain the system-dependent critical amplitudes B, ξ...

article

The liquid–liquid coexistence curves of {x dimethyl adipate+(1−x) n-octane} and {x dimethyl adipate+(1−x) n-nonane} in the critical region

Zhiyun Chen, Li Cai, Meijun Huang, Tianxiang Yin, more

The Journal of Chemical Thermodynamics > 2012 > 51 > Complete > 132-138

The liquid–liquid coexistence curves of (dimethyl adipate+n-octane) and (dimethyl adipate+n-nonane) have been determined within about 10K from the critical temperatures, from which the critical amplitudes and the critical exponents are deduced. The critical exponents corresponding to the coexistence curve β are consistent with the 3D-Ising values. The experimental results have been analyzed to determine...

article

The effect of the spacer rigidity on the aggregation behavior of two ester-containing Gemini surfactants

Zhiguo Zhang, Peizhu Zheng, Yimin Guo, Yan Yang, more

Journal of Colloid And Interface Science > 2012 > 379 > 1 > 64-71

Two Gemini surfactants with very similar structure but different spacer rigidity, namely 1-dodecanaminium,N,N′-[[(2E)-1,4-dioxo-2-butene-1,4-diyl]bis(oxy-2,1-ethanediyl)]bis[N,N-dimethyl-,bromide] (12-fo-12) and 1-dodecanaminium, N,N′-[(1,4-dioxo-1,4-butanediyl)bis(oxy-2,1-ethanediyl)] bis[N,N-dimethyl-, bromide] (12-su-12), and their monomeric counterpart 1-dodecanaminium, N-[2-(acetyloxy)ethyl]-N,N-dimethyl-,...

article

Microstructure study of liposomes decorated by hydrophobic magnetic nanoparticles

Dan Qiu, Xueqin An, Zhiyun Chen, Xingyuan Ma

Chemistry and Physics of Lipids > 2012 > 165 > 5 > 563-570

Magnetoliposomes, consisting of liposomes and magnetic nanoparticles (MNPs), have been tailored as very promising delivery vehicles in biotechnology and biomedicine applications. In this paper, liposomes with hydrophobic MNPs were prepared. The hydrophobic MNPs were successfully embedded in the lipid bilayer, which was proved by the results obtained from transmission electron microscope, atomic force...

article

A near-infrared-emitting CdTe/CdS core/shell quantum dots-based OFF–ON fluorescence sensor for highly selective and sensitive detection of Cd2+

Rijun Gui, Xueqin An, Hongjuan Su, Weiguo Shen, more

Talanta > 2012 > 94 > Complete > 257-262

A near-infrared-emitting CdTe/CdS core/shell quantum dots (QDs)-based photoluminescence (PL) sensor was designed and applied for highly selective and sensitive detection of Cd ²⁺ . This sensor was based on a PL “OFF–ON” mode. First, the addition of ammonium pyrrolidine dithiocarbamate (APDC) led to remarked PL quenching of QDs. Second, PL of APDC surface modified QDs (QDs-APDC) was gradually...

article

Rhodamine 6G conjugated-quantum dots used for highly sensitive and selective ratiometric fluorescence sensor of glutathione

Rijun Gui, Xueqin An, Hongjuan Su, Weiguo Shen, more

Talanta > 2012 > 94 > Complete > 295-300

Rhodamine 6G (R6G) and 3-mercaptopropionic acid (MPA) capped-CdTe quantum dots (QDs) were conjugated by electrostatic interactions in aqueous solution. The R6G-QDs conjugate was utilized as a photoluminescence (PL) ratiometric sensor for the detection of glutathione (GSH). In this method, intentional introduction of GSH destroyed the conjugation of R6G and QDs, and induced regular PL change of R6G-QDs...

article

The liquid–liquid coexistence curves of {x dimethyl adipate+(1−x) n-hexane} and {x dimethyl adipate+(1−x) n-heptane} in the critical region

Zhiyun Chen, Li Cai, Meijun Huang, Tianxiang Yin, more

The Journal of Chemical Thermodynamics > 2012 > 48 > Complete > 229-234

The liquid–liquid coexistence curves for (dimethyl adipate+n-hexane), (dimethyl adipate+n-heptane) have been measured, from which the critical amplitudes and the critical exponents are deduced. The critical exponent β corresponding to the coexistence curves are consistent with the 3D-Ising value. The experimental results have also been analyzed to determine the critical amplitudes of Wegner-correction...

article

Coexistence curves of ionic liquid in oil microemulsions of {[bmim][BF4]+T-X100+cyclohexane} with various molar ratio of [bmim][BF4] to T-X100 in the critical region

Huihong Lü, Xueqin An, Weiguo Shen

The Journal of Chemical Thermodynamics > 2012 > 48 > Complete > 48-53

The coexistence curves (T,n), (T,Φ), and (T,Ψ) (n, Φ, and Ψ are the refractive index, volume fraction, and effective volume fraction, respectively) for the ionic liquid microemulsion systems of {polyoxyethylene tert-octylphenyl ether (T-X100)+1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF ₄ ])+cyclohexane} with various molar ratio (ω) of [bmim][BF ₄ ] to T-X100 have been...

article

Characteristics, phase behavior and control release for copolymer–liposome with both pH and temperature sensitivities

Wenting Zhou, Xueqin An, Junzhi Wang, Weiguo Shen, more

Colloids and Surfaces A: Physicochemical and Engineering Aspects > 2012 > 395 > Complete > 225-232

A pH- and thermo-sensitive berberine hydrochloride liposome modified by the poly(N-isopropylacrylamide-co-methacrylic acid-co-octadecyl acrylate) was synthesized. The morphology and size were determined by atomic force microscope (AFM) and dynamic light scattering (DLS). The phase transition temperature (T _pm ) and phase transition pH (pH*) of the copolymer–liposome were obtained by differential...

Publication date

Set your own date range

INFONA - science communication portal

Search results for: Xueqin An

Easy synthesis of highly fluorescent carbon dots from albumin and their photoluminescent mechanism and biological imaging applications

Folate-polydiacetylene-liposome for tumor targeted drug delivery and fluorescent tracing

White light emitting ternary quantum dots phosphors with controllable chromaticity and fluorescence resonance energy transfer

Silver nanoparticles synthesis using H2 as reducing agent in toluene–supercritical CO2 microemulsion

Controllable release from magnetoliposomes by magnetic stimulation and thermal stimulation

An improved method for ratiometric fluorescence detection of pH and Cd2+ using fluorescein isothiocyanate–quantum dots conjugates

Diels‐Alder Reaction in microemulsions with ionic liquid

Thermosensitive, reversible luminescence properties and bright fluorescence imaging of water-soluble quantum dots/microgels nanocompounds

Temperature-dependent stability and DPPH scavenging activity of liposomal curcumin at pH 7.0

Comparative study on the interactions of cationic gemini and single-chain surfactant micelles with curcumin

The liquid–liquid coexistence curves of {benzonitrile+n-pentadecane} and {benzonitrile+n-heptadecane} in the critical region

Critical behavior of binary mixture of {(1−x) C6H5CN+x CH3(CH2)9CH3}: Measurements of coexistence curves, turbidity, and heat capacity

The liquid–liquid coexistence curves of {x dimethyl adipate+(1−x) n-octane} and {x dimethyl adipate+(1−x) n-nonane} in the critical region

The effect of the spacer rigidity on the aggregation behavior of two ester-containing Gemini surfactants

Microstructure study of liposomes decorated by hydrophobic magnetic nanoparticles

A near-infrared-emitting CdTe/CdS core/shell quantum dots-based OFF–ON fluorescence sensor for highly selective and sensitive detection of Cd2+

Rhodamine 6G conjugated-quantum dots used for highly sensitive and selective ratiometric fluorescence sensor of glutathione

The liquid–liquid coexistence curves of {x dimethyl adipate+(1−x) n-hexane} and {x dimethyl adipate+(1−x) n-heptane} in the critical region

Coexistence curves of ionic liquid in oil microemulsions of {[bmim][BF4]+T-X100+cyclohexane} with various molar ratio of [bmim][BF4] to T-X100 in the critical region

Characteristics, phase behavior and control release for copolymer–liposome with both pH and temperature sensitivities

Filter options

Publication date

Keywords

Data set

Journal

INFONA - science communication portal

Search results for: Xueqin An

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Keywords

Data set

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options