Flexible and Printed Electronics
·
2021
·Vol. 6
·期 4
·045007
·
IF 3.588
Feng-Jie Yan,Wan-Qing Huang,Xu-Hui Sang,Jun-Ge Liang,Xi Wan,Feng Shao,Xiao-Feng Gu
To practice the development of printed electronics, researchers need to have the access to dedicated printer of electronic materials. However, commercial printing machines require large capital investment. Direct ink write (DIW) printing on the other hand operates with single printing head and less complex system therefore is promising for tight budget projects. Herein, a DIW printing system was home-built by making modifications to a 3D printer with ready to use components. Direct pattering and minimal printing line width of 230 ± 10 µm are demonstrated using an all solution-based Ag ink. Resistive-type humidity sensors were fabricated with DIW printed Ag electrodes and poly (diallyl dimethyl ammonium chloride) (PDDA) sensing layer. Humidity sensing performance of the sensors were examined and by taking advantage the flexibility of printing deposition, DIW printing was used to make quick modification toward a partially covered sensor structure for improved performance. Sensing response of more than 99% was obtained from 10% RH to 90% RH. Smaller hysteresis of ±4.4% RH and faster response of 7 s for adsorption and 213 s for desorption were obtained with the partially covered sensor. DIW printing is found to be a useful tool for device prototyping and ink development of printed electronics.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF PHARMACEUTICS
·
2013
·
IF 3.458
Chen Zhang,Qinfu Zhao,Long Wan,Tianyi Wang,Jin Sun,Yikun Gao,Tongying Jiang,Siling Wang
A new oral sustained drug delivery system (DDS) involving a combination of inorganic mesoporous material (CMK-5) and organic polymer poly dimethyl diallyl ammonium (PDDA) was established to determine its general suitability for use with poorly water soluble drugs. Nimodipine , carvedilol and fenofibrate , three different drugs with acidic or alkaline properties, were selected as model drugs and loaded into carriers. The physicochemical properties of the drug carriers were systematically studied using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and nitrogen adsorption. The structural body changes of the composites in release medium, with or without additional salts, were also studied using particle sizing systems, nitrogen adsorption and zeta potential measurement in order to investigate the sustained release mechanism of the drugs. The results obtained showed that sustained release of drug from the designed DDS was mainly due to the blockage effect arising from the strong swelling of the coated polymers when in contact with release medium. Additional salts, when they reached a certain level, allowed a dramatic burst release. We believe that our designed sustained DDS provide a new option for water insoluble drugs and can be considered as fundamental for those more sophisticated DDS increasingly required in modern medical treatments.
研究领域:
药剂学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Kun Hou,Yicheng Zeng,Cailong Zhou,Jiahui Chen,Xiufang Wen,Shouping Xu,Jiang Cheng,Yingguang Lin,Pihui Pi
A durable underwater superoleophobic mesh was conveniently prepared by layer-by-layer (LBL) assembly of poly (diallyldimethylammonium chloride) (PDDA) and halloysite nanotubes (HNTs) on a stainless steel mesh. The hierarchical structure and roughness of the PDDA/HNTs coating surface were controlled by adjusting the number of layer deposition cycles. When the PDDA/HNTs coating with 10 deposition cycles was decorated on the mesh with pore size of about 54 μm, the underwater superoleophobic mesh was obtained. The as-prepared underwater superoleophobic PDDA/HNTs decorated mesh exhibits outstanding oil–water separation performance with a separation efficiency of over 97% for various oil/water mixtures, which allowed water to pass through while repelled oil completely. In addition, the as-prepared decorated mesh still maintained high separation efficiency above 97% after repeated 20 separation times for hexane/water mixture or chloroform/water mixture. More importantly, the as-prepared decorated mesh is durable enough to resist chemical and mechanical challenges, such as strong alkaline, salt aqueous and sand abrasion. Therefore, the as-prepared decorated mesh has practical utility in oil–water separation due to its stable oil–water performance, remarkable chemical and mechanical durability and the facile and eco-friendly preparation process.
✓ 已验证
DOI
高影响因子
IONICS
·
2016
·Vol. 22
·期 11
·2225-2233
·
IF 2.119
Lu Juanjuan,Liu Yuelin,Liu Xinhe,Lu Xiaoquan,Liu Xiuhui
In this article, we constructed an electrochemical sensor for highly sensitive determination of β-nicotinamide adenine dinucleotide (NADH) using the poly(diallyldimethylammonium chloride)-functionalized reduced graphene oxide nanocomposite modified electrode (PDDA-rGO/GCE). The nanocomposite was characterized by transmission electron microscopy, Fourier transform-infrared spectrometry, ultraviolet-visible absorption spectrometry, cyclic voltammetry, and electrochemical impedance spectroscopy. The experimental results demonstrated that the fabricated sensor exhibited excellent electrocatalytic activity on the oxidation of NADH with a decreased about 200 mV in overpotential and 5.0-fold increment in the oxidation peak current compared to a bare GCE. Applying cyclic voltammetry, a wide linear range from 1.0 × 10 −7 to 2.9 × 10 −3 M with low limit of detection (LOD) of 3.4 × 10 −8 M and high sensitivity of 463.3 μA mM −1 cm −2 were obtained, which was superior to other NADH electrochemical sensors reported previously. Furthermore, the fabricated NADH sensor possessed excellent selectivity, reproducibility, and stability. The oxidation mechanism of NADH at the PDDA-rGO/GCE was also discussed in detail.
A simple NADH sensing platform based on PDDA-rGO composite is constructed, which exhibits an ultra-low detection limit ( 3.4×10-8 M) towards the oxidation of NADH, and the electrochemical reaction mechanism of NADH is discussed in detail.
研究领域:
生物电化学
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生物传感器
·
纳米生物技术
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分子诊断
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转化医学
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电分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Zixin Wang,Chenguang Zhu,Shangfa Pan,Jilong Fan,Tianwen Wang,Jun Gao
Energy harvesting from acid-base neutralization through the reverse electrodialysis technique provides a sustainable route to recover the chemical potential inherent in industrial effluents, thereby preventing the dissipation of Gibbs free energy as thermal waste. However, conventional reverse electrodialysis relies on homogeneous charge-selective membranes, which induce severe concentration polarization and consequently result in low power densities. Herein, we report an asymmetric Janus graphene oxide/poly (diallyldimethylammonium chloride) (GO-PDDA) composite membrane, featuring contrasting surface charges. This design facilitates directed H + /OH − translocation, which effectively suppresses polarization effects and promotes neutralization within the channels. Under a 1 M HCl/NaOH gradient, the GO-PDDA membrane delivered a peak power density of 265.92 W m −2 at an active area of 0.03 mm 2 and 16.87 W m −2 at 3.14 mm 2 , indicating promising performance for neutralization-energy harvesting. These results demonstrate that the asymmetric GO-PDDA membrane is a promising platform for recovering neutralization energy from acid/base waste streams and for advancing scalable nanofluidic energy-conversion technologies.
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2025
·
IF 4.9
Jintian Qian,Mingxia Feng,Dawu Lv,Ruiqin Tan,Wenfeng Shen,Weijie Song
Flexible humidity sensors play a crucial role in the real-time monitoring of human physiological activities by being integrated with smart terminals, compact medical devices and flexible electronic skins. In this work, a facile fabrication method of a flexible humidity sensor based on a composite material of poly(diallyldimethylammonium chloride) (PDDA) and polyaniline (PANI) using in-situ polymerization and dip-coating techniques was proposed on a microporous poly(vinylidene fluoride) (PVDF) filter membrane substrate. The resulting PDDA@PANI/PVDF-3.50 % sensor demonstrates remarkable sensitivity with a response of up to 5249 % across a humidity range of 11–97 % relative humidity (RH), minimal hysteresis (∼1.2 %), rapid response and recovery times (11 s and 28 s), stable performance under mechanical deformation, and excellent long-term durability. Additionally, the sensor can readily identify three breathing states and detect finger movements as short as 1 mm. The excellent performance is attributed to the hydrophilic modification and synergistic effect of PDDA on PANI chain, and the rich microporous structure of PVDF membrane. This work offers a novel strategy for developing advanced flexible sensors with significant potential in wearable electronic devices for healthcare and human-computer interaction.
研究领域:
材料科学
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生物医学工程
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Jinxiu Guo,Zhaoyan Wang,Ping Sun,Qianyong Tang,Hongli Li,Xiayan Wang,Guangsheng Guo,Qiaosheng Pu
Electrophoresis on plastic microchips is an economic way for rapid separation and determination of multiple analytes, but its application is frequently limited by the unstable electroosmotic flow (EOF) and non-specific adsorption of certain analytes and sample matrices. In this work, cationic polymer poly (diallyldimethylammonium chloride) (PDDA) was used as the background electrolyte (BGE) to eliminate the non-specific adsorption, control the EOF, regulate the viscosity and improve the separation efficiency on cyclic olefin copolymer microchips with 75 μm id microchannels. Three rhodamine dyes that are easily adsorbed on plastics were separated in the presence of organic solvents. Influences of the experimental conditions were systematically investigated and the performance was compared with anionic polymer polyacrylic acid or neutral polymer hydroxypropyl cellulose. The effectiveness of ionic polymers for the modulation of EOF was demonstrated. With PDDA as BGE, three rhodamine dyes were well separated and baseline separation could be achieved in 20 s with a voltage as low as 400 V using a microchannel of 1 cm long and 75 μm id. The determination of rhodamine dyes in foods and lipsticks was performed to verify the robustness and applicability of the proposed methods. Separation of peptides and proteins labeled by rhodamine B isothiocyanate was also performed with the proposed running medium.
研究领域:
分析化学
·
电泳技术
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2020
·
IF 5.339
Yuhuan Wang,Zhixing Zeng,Jianyu Qiao,Shuqing Dong,Qing Liang,Shijun Shao
An ultrasensitive and high-performance electrochemical nitrite sensing platform based on gold nanoparticles deposited on poly (dimethyl diallyl ammonium chloride)-decorated MXene (Ti 3 C 2 T x ) (AuNPs/Ti 3 C 2 T x -PDDA) was constructed. AuNPs/Ti 3 C 2 T x -PDDA on the surface of electrode displayed synergetic catalytic effect for oxidizing NO 2 ‾ originating from especially catalytic activity of AuNPs, large area and excellent conductivity of Ti 3 C 2 T x , as well as electrostatic interaction of PDDA. The amperometry technique was employed for quantitative determination of nitrite, in which the AuNPs/Ti 3 C 2 T x -PDDA/GCE sensing platform showed outstanding linear relationship in 0.1–2490 μM and 2490–13490 μM for nitrite, meanwhile the detection limit of 0.059 μM. Besides, the prepared sensor possessed high sensitivity of 250 μA mM −1 cm −2 yet excellent selectivity, stability and reproducibility. Furthermore, this platform also exhibited satisfactory feasibility of nitrite sensing in running water and ham sausage sample. This work would broaden a facile approach to construct high sensitivity electrochemical sensing platform via two-dimension materials and its nanocomposites.
研究领域:
材料科学
·
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Scientific Reports
·
2014
·Vol. 4
·期 1
·1-9
·
IF 5.078
Xu Wanxing,Li Xianfeng,Cao Jingyu,Zhang Hongzhang,Zhang Huamin
In this work we presented a general strategy for the fabrication of membranes with well-defined ions transport channels through solvent-responsive layer-by-layer assembly (SR-LBL). Multilayered poly (diallyldimethylammonium chloride) (PDDA) and poly (acrylic acid) (PAA) complexes were first introduced on the inner pore wall and the surface of sulfonated poly (ether ether ketone)/poly (ether sulfone) (PES/SPEEK) nanofiltration membranes to form ions transport channels with tuned radius. This type of membranes are highly efficient for the separators of batteries especially vanadium flow batteries (VFBs): the VFBs assembled with prepared membranes exhibit an outstanding performance in a wide current density range, which is much higher than that assembled with commercial Nafion 115 membranes. This idea could inspire the development of membranes for other flow battery systems, as well as create further progress in similar areas such as fuel cells, electro-dialysis, chlor-alkali cells, water electrolysis and so on.
研究领域:
材料科学
·
电化学
·
能源存储
·
电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Xuezhen Feng,Yakun Zhang,Chunyan Liang,Jingang Yu,Xinyu Jiang
A novel adsorbent, poly-(dimethyl diallyl ammonium chloride) (PDDA) functionalized graphene oxide (GO) further decorated with ferro ferric oxide (Fe 3 O 4 ) nanoparticles, has been developed and used for instantaneous Cr(VI) removal from aqueous solution, and a reliable direct filtration-adsorption was achieved. Fourier transform infrared (FTIR) spectroscopy, Raman spectra (Raman), zeta potential measurement, scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS) and differential pulse voltammetry (DPV) were adopted to confirm and investigate the chemical compositions, surface properties, morphological and electrochemical performance of the as-prepared magnetic nanocomposite (denoted as GO/PDDA/Fe 3 O 4 ). The maximum adsorption capacity of GO/PDDA/Fe 3 O 4 for Cr(VI) was 141.68 mg/g at pH = 2, and the desorption-regeneration results exhibited GO/PDDA/Fe 3 O 4 could be a potential prospective nanocomposite used for instaneous filtration-adsorption of Cr(VI) from aqueous solution in real-life situations due to its fast, effective and stable properties.
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Min Zhang,Dongmei Fu
A gas-liquid interface approach was developed for the synthesis of ternary Pd-Au-P composites, which were supported on poly(diallyldimethylammonium chloride)-functionalized reduced graphene oxide (PDDA/RGO). The as-synthesized composites were characterized by transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The Pd-Au-P-PDDA/RGO composites as an electrochemical dopamine (DA) sensor showed superior electrocatalytic activity and stability toward DA oxidation as compared with Pd- Au-PDDA/RGO and Pd-Au-P/RGO. The enhanced electrochemical performance could be attributed to the effect of electronic structure and long-range disorder and short-range structure due to the doping of P element. By studying the kinetics of DA oxidation, electrochemical DA oxidation was proven to be irreversible and follow Laviron Equation. Using differential pulse voltammetry (DPV), the Pd-Au- P/PDDA/RGO sensor had low detection limit of 0.7 ^M, wide linear range of 3.5-125 ^M and relatively high sensitivity (0.2858 μA/μM), which was suitable for the detection of biological and environmental samples.
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
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Li Liu,Li Wang,Qisheng Liang,Tao Guo,Feng Guo
Copper oxide-single walled carbon nanotube (CuO-SWCNT) hybrid nanostructure and poly-(diallyldimethylammonium chloride) (PDDA) modified glassy carbon electrode (GCE) for sensitive enzyme-free H 2 O 2 detection has been fabricated via electrostatic interaction strategies. Characterization by XRD, IR and SEM showing that CuO was coated on SWCNT molecular wires, and positively charged PDDA attached to the negatively charged SWCNT, thus CuO-SWCNT-PDDA was constructed. The reduction peak current of H 2 O 2 was significantly increased due to the catalytic property of CuO, which was further enhanced by the synergic effect of SWCNT due to its improvement of electron transfer rate. The calibration curve was linear in the range of 1–1150 µM with a detection limit of 0.39 µM. The electrode coupled with amperometric measurement was successfully applied in H 2 O 2 residue determination in milk and the soaking solutions of chicken paw samples. The results have no remarkable difference compared with the reference UV–Vis method.
研究领域:
食品科学
·
分析化学
·
纳米材料
✓ 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）