KEY ENGINEERING MATERIALS
·
2016
·
IF 0
Jian Shu,Yu Song Liao
Poly (diallyl dimethylammonium chloride)-graphene oxide multilayer film (PDDA/GO) was successfully fabricated onto a silicon substrate by a layer-by-layer self-assembly technology. Subsequently, PDDA/GO were thermally reduced to be PDDA/RGO in a vacuum. X-ray photoelectron spectroscopy (XPS) was carried out to investigate the formation and microstructure of multilayer samples, as well as by water contacted angle (WCA). Results indicates that the multilayer film was prepared successfully, and the surface energy of PDDA/RGO is lower than PDDA/GO. nanotribological properties was investigated by an atomic force microscopy (AFM). It was found that the frictional coefficients of PDDA/RGO is better than PDDA/GO. To investigate the micro-tribological behaviors, a ball-on-plate tribometer was adopted. Results show that the layer-by-layer self-assembled multilayer thin film possesses good frictional and anti-wear properties. Therefore, both nanoand micro friction performance of PDDA/RGO behaves better than PDDA/GO. The obtained samples make the further application to be more possible.
研究领域:
材料科学
·
表面工程
·
纳米技术
✓ 已验证
DOI
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Jianping Yang,Qiaowen Lin,Wei Yin,Tao Jiang,Danhua Zhao,Liaochuan Jiang
In this work, a novel glucose sensor based on Poly-(dimethyl diallyl ammonium chloride) (PDDA) functionalized graphene decorated with cupric oxide (CuO) nanoparticles has been developed. The nanocomposite modified electrode exhibited excellent sensitivity and stability toward oxidation of glucose owing to the synergistic effects of highly electrocatalytic CuO and remarkably electron conductive PDDA-graphene. The composition of PDDA-graphene was confirmed by FT-IR spectrum. The morphology of the nanocomposites was characterized by scanning electron microscopy and X-ray diffraction. The electrochemical performance of the PDDA-graphene/CuO electrode for glucose measurement was investigated by cyclic voltammetry and chronoamperometry. The sensor presented a high sensitivity of 4982.2 μA mM −1 cm −2 over 0.4–4000 μM glucose concentration range at +0.58 V with a detection limit of 0.20 μM. Most importantly, the sensor is highly stable for a long time without current attenuation and is simply fabricated without any binder. The sensor can also be utilized for quantification of glucose concentration in serum samples. The proposed sensor offers an alternative for glucose analysis with high sensitivity, good stability and fast response time.
研究领域:
生物医学工程
·
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 8
·2659-2669
·
IF 6.177
Maoqi Li,Jian Wu,Guoliang Shen
Photocatalytic water splitting for hydrogen production and water pollutant degradation is a frontier topic to solve energy and environmental problems. In particular, applying electric and magnetic fields on photocatalysts is the most promising solution to improve their catalytic activity. In this work, bifunctional catalyst PDDA-coated β-Fe2O3 nanoclusters (β-Fe2O3@PDDA) have been successfully synthesized by a simple one-pot method at 200 °C. β-Fe2O3@PDDA exhibits excellent photoelectrocatalytic (PEC) activity for the oxygen evolution reaction (OER) with an overpotential of 300 mV, Tafel slope of 45 mV dec−1 and good catalytic stability. Moreover, β-Fe2O3@PDDA exhibited a good magnetic field-enhanced photocatalytic (MF-PC) RhB degradation activity under artificial simulated sunlight; the photocatalytic efficiency can be improved by 44% under an external magnetic field than that without a magnetic field. The surface PDDA-coated β-Fe2O3 can be stably dispersed in water for more than 10 days without agglomeration, which is of great significance for the MF-PC degradation of water pollutants in practical applications. The high catalytic activity for MF-PC is attributed to the magnetic field-suppressed electron–hole recombination and the spin-polarized properties of β-Fe2O3 in photocatalysis. Our study provides a new strategy for the preparation of highly dispersed β-Fe2O3 nanoclusters under mild conditions and the development of ultrastable organic/inorganic composite photocatalysts. This opens up a new avenue for developing electric and magnetic field-enhanced photocatalysts for use in clean energy and environmental control.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
VIBRATIONAL SPECTROSCOPY
·
2022
·
IF 2.382
Yuanjie Teng,Zhenni Wang,Weihao Huang,Yuanbin She
Some noble metal colloids with negative charges were mostly used as surface-enhanced Raman scattering (SERS) substrates, that the Raman signals of negatively charged molecules are hard to be detected because of the electrostatic repulsion among them and the negatively charged metal nanoparticles . Herein, Ag nanoparticles (Ag NPs) with positive charges and its Ag nanofilm were prepared by poly dimethyl diallyl ammonium chloride (PDDA) to realize the SERS detection of negatively charged molecules directly. The zeta potential and its particle sizes were characterized to select the optimum condition of PDDA. In addition, the morphology of positive Ag NPs and Ag nanofilm was characterized by UV–Vis spectroscopy and transmission electron microscopy . The SERS effect of negatively charged thiamphenicol on positively charged Ag nanofilm was significantly enhanced at the optimum condition and its sensitivity was significantly improved compared with normal Ag nanofilm. The proposed novel positively charged Ag nanofilm can be further applied to detect other negatively charged molecules by SERS.
研究领域:
分析化学
·
纳米科学
·
光谱学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Ruisen Jing,Junshan Yang,Shutao Li,Shifeng Zhao,Pengfei Wang,Yunyan Liu,Aiju Liu,Zilin Meng,Hongwei Huang,Zhilei Zhang,Qian Zhang
The use of black phosphorus (BP) nanosheets has attracted much attention in the area of photocatalysis owing to the thickness-tunable bandgap and high carrier mobility. In order to improve the stability of BP nanosheets, poly dimethyldiallyl ammonium chloride (PDDA) is used to passivate the BP nanosheets and change its surface properties. The present study concerns the development of a facile electrostatic assembly method for the construction of a Z-scheme system consisting of PDDA-functionalized BP nanosheets and layered BiOI in order to enhance visible light adsorption and promote electron-hole separation. The morphology, structure and photoelectrochemical properties of the composites are thoroughly characterized and the photocatalytic performances of all the samples were assessed under visible light irradiation. The 5-F-BP/BiOI exhibits excellent photocatalytic activity with removal efficiencies of 97.6% and 90.0% for methylene blue (MB) and tetracycline (TC), respectively. Superoxide radicals (·O 2 – ) were found to be the main organic decomposition products according to species trapping experiments. The photocatalyst presents favorable stability after three catalytic cycles. This study provides new insights into the design of highly efficient Z-scheme photocatalysts based on functionalized BP nanosheets in order to meet environmental demands.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICS EXPRESS
·
2025
·Vol. 33
·期 1
·1359-1370
·
IF 3.3
Huiyuan Zhang,Mingyu Li,Mingyu Li,Qiu-Shun Li,Qiu-Shun Li,Xiujing Yan,Yubo Xia,Yuxia Song,Tuo Chen,Wen-Fei Dong,Jian-Jun He
In this paper, poly(diallyldimethylammonium chloride)(PDDA)/poly(sodium styrene sulfonate)(PSS) nanomembranes were deposited on the surface of long-period fiber gratings (LPFG) using the electrostatic layer-by-layer (LBL) assembly method, and the effect of NaCl on the modulation of LPFG double peaks by PDDA/PSS nanomembranes was investigated. The principle behind the emergence of double peaks was first explored using coupled mode theory, revealing that changes in the mode effective refractive index(RI) occur as the number of nanomembrane layers increases. The experimental results showed that under the conditions of PDDA with NaCl/PSS without NaCl and PDDA without NaCl/PSS with NaCl, double peaks do not appear in the spectra of LPFG as the number of thin film layers increases. In contrast, highly sensitive double peaks appear in the spectra of LPFG when both PDDA and PSS contain NaCl. Additionally, the range of these double peaks was explored. It was shown that the sensitivity of LPFG to the nanomembrane reached a maximum at 79-81 bilayers, with a sensitivity of 37.8 nm/bilayer, and the appearance of double peaks was consistent with the theoretical simulation. The findings of this study will be applied to the modification of LPFG surface biofunctional membranes and the highly sensitive detection of biochemical substances.
研究领域:
光学传感
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2018
·
IF 2.21
Yuanfang Xiang,M. Katherine Banks,Ruoxi Wu,Weijian Xu,Shu Chen
A thermo-sensitive graphene-based hybrid is prepared by the electrostatic interactions between the poly(diallyldimethylammonium chloride)-co-poly(N- isopropylacrylamide) (PDDA-co-PNIPAM) and graphene oxide (GO). The electrostatic interaction, chemical structure , morphology and thermo-sensibility of the hybrid are systematically characterized, which have been manifested that the electrostatic interaction between the PDDA-co-PNIPAM and GO is strong, and the employment of the cationic PDDA-co-PNIPAM results into a well distributed polymer nanoparticles on the GO sheets. The new PDDA-co-PNIPAM/GO hybrid has good dispersity in some polar solvents. Notably, the phase transition of this hybrid can be reversibly modulated by temperature in water, which can be applied as thermo-switch material for the adsorption and separation of the organic pigments in aqueous solutions.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2022
·
IF 7.34
Qianqian Pei,Ming Chen,Jingda Li,Jie Liu,Nan Wu,Kaiyang Chen,Xiaoyu Chen,Yanli Liu,Yifeng Feng,Gaofeng Ren,Xiaoying Liu
Ammonia oxidation is a critical process during nitrogen removal, while the activity of ammonia oxidizing bacteria (AOB) might be impacted severely in disposing high-salinity nitrogen-containing wastewater. To protect AOB in high saline medium, layer-by-layer self-assembly using graphene oxide (GO) and poly(diallyl dimethyl ammonium chloride) (PDDA) was applied to immobilize enriched AOB. By mixing GO and AOB, it was found that 30 mg/L GO showed the best promotion on the ammonia oxidation capacity of AOB. After coating, AOB with PDDA/GO showed higher absolute value of zeta potential of −20.1 ± 1 mV and compact structure. Comparing with uncoated AOB, although NH 4 + -N consumption process was slightly inhibited by the PDDA/GO composite materials under low-salinity conditions (0–2 % NaCl), they presented great effective protection on the capacity of AOB in a 3 % NaCl solution. The consumption ratio of NH 4 + -N was 1.34 times that of uncoated AOB, and the accumulation ratio of NO 2 − -N of the former one was 1.40 times that of the latter. It inferred that the inhibitory to mass transferring caused by immobilizing materials was less than its positive promotion of AOB protection at 3 % NaCl concentration, and the protection of PDDA/GO composite materials was better than GO. This finding has some certain guiding significance for ammonia oxidation in high salinity.
研究领域:
环境微生物学
·
污水处理工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2018
·Vol. 18
·期 4
·2993-2999
·
IF 1.354
Liu Chun-Ling,Hou Chang-Jun,Huo Dan-Qun
In this work, a simple room-temperature phosphorescence (RTP) method was first proposed to detect adriamycin, by using a functional material of Mn doped ZnS quantum dots (Mn–ZnS QDs) composited with poly(diallyldimethylammonium chloride) (PDDA). After PDDA was associated to the
Mn–ZnS QDs, the RTP intensity was significantly enhanced. As a result, Mn–ZnS QDs/PDDA nanoassemblies greatly improve the adriamycin detection ability of QDs and provide an important method for developing more effective and sensitive adriamycin detection sensor. The method based
upon RTP has a linear range from 0.5 to 64.0 μM with a detection limit (3σ/s) for adriamycin of 0.45 μM. The developed method was further successfully applied to detect adriamycin in human serum samples (diluted 50 times) with satisfactory results, and
the recovery ranged from 98.3 to 101.3.
研究领域:
分析化学
·
生物医学工程
·
药物分析
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Hui Zhong,Yonghua Yuan,Min Qing,Jianli Zuo,Yueyuan Li,Lijuan Bai
The extracellular domain of the human epidermal growth factor receptor (HER2-ECD) is a breast cancer biomarker. Accurate and sensitive detection of HER2-ECD concentration in serum is crucial in the diagnosis and patient follow-up. Herein, an “off–on” type electrochemiluminescence (ECL) aptasensor based on the resonance energy transfer (RET) between AuPt@ZIF-67 and AuNPs/g-C3N4/PDDA was developed for detecting HER2-ECD. First, AuNP-modified g-C3N4 (AuNPs/g-C3N4/PDDA), as a signal substrate, generates ECL signals under the co-reactant peroxodisulfate (S2O82–) in a specific potential range and shows significantly enhanced signal strength and stability. Then, AuPt@ZIF-67 expeditiously quenched the ECL signal of AuNPs/g-C3N4/PDDA because of ECL resonance energy transfer (ECL-RET) between AuPt@ZIF-67 and AuNPs/g-C3N4/PDDA. We designed a new aptasensor detection platform for HER2-ECD detection. After specific binding of the aptamer with HER2-ECD, the AuPt@ZIF-67 content in the system decreased, and the ECL response recovered. The biosensor demonstrated a linear range of HER2-ECD detection between 100 fg/mL and 100 ng/mL under ideal circumstances, with a low detection limit of 17.3 fg/mL. Furthermore, this biosensor was successfully tested in human serum samples. This strategy, as a novel ECL system with satisfactory stability and excellent sensitivity, can realize the detection of other biological molecules by changing the probe, which is a promising method.
研究领域:
生物医学工程
·
分析化学
·
肿瘤学
✓ 已验证
产品关联
DOI
高影响因子
Results in Chemistry
·
2022
·
IF 0
Zhixing Zeng,Jianyu Qiao,Cong Tang,Shijun Shao
The development of highly efficient and stable electrocatalysts for their application in electrochemical detection is desirable. Herein, a new copper nanowires (CuNWs) modified electrode was fabricated by coating poly(dimethyl diallyl ammonium chloride) (PDDA) stabilized CuNWs composite onto the the glassy carbon electrode (GCE), and used for electro-catalyze and determination of cysteine (CySH). The morphology, structure, and surface property of fabricated CuNWs were tested using SEM, XRD, and XPS, separately. Electrocatalytic behavior of the modified electrode (CuNWs-PDDA/GCE) for CySH oxidation in alkaline medium was researched by cyclic voltammetry (CV) and chronoamperometry (CA) thoroughly, displaying excellent electrocatalytic oxidation activity and sensing ability towards CySH with a rapid and sensitive anodic current response at low oxidation potential. In the amperometric detection of CySH, the as-prepared electrode displayed a significantly wide linear range from 2 μM to 260 μM and a detection limit of 0.19 μM with a sensitivity of 1.430 μAμM −1 cm −2 . The proposed CySH sensor exhibited good reproducibility, stability, and anti-interference ability, and has been used to detect CySH in human plasma samples successfully with good applicability.
研究领域:
分析化学
·
生物医学工程
·
材料科学
✓ 已验证
DOI
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Zhenming Wang,Junyu Chang,Qi Hu,Hui Zhi,Liang Feng
To improve the sensing performance of the traditional semiconductor sensor towards triethylamine (TEA), the poly(diallyldimethylammonium chloride) (PDDA) has been applied to functionalize the reduced graphene oxide (rGO), which has been further decorated by the polyaniline (PANI) nanocones via an in-situ polymerization method. The existence of PDDA during the synthetic process could efficiently prevent the restacking of rGO and promote the reduction of graphene oxide, which is beneficial for producing uniform PANI nanocones on the rGO sheets and improving the sensitivity to TEA. The sensor fabricated by the PDDA-rGO-PANI has exhibited excellent sensing performance to the TEA with superior sensitivity, stability and selectivity at room temperature. The sensor possesses a perfect linear coefficient of 0.999 from 2 to 100 ppm TEA and an extremely low limit-of-detection (LOD) of 74 ppb. In addition, the sensor has presented an outstanding anti-interference ability against humidity, other interfering gases (ammonia and common VOCs) and even mechanical bending. Finally, a self-powered sensing system containing a homemade triboelectric nanogenerator (TENG), a commercial flexible electrode, a button battery and the integrated circuit LTC3588 has been fabricated. The size of TENG is only 3.5×3.5 cm 2 while the sensing system after integrated on a PI membrane is just 2×4 cm 2 , which makes the sensor a promising potential candidate of wearable sensing to TEA in daily life.
研究领域:
材料科学
·
环境监测
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）