Analytical Methods
·
2019
·Vol. 11
·期 8
·1131-1136
·
IF 2.378
Yueying Zhang,Dan Gao,Shangfu Li,Weili Wei,Jinshun Lin,Yuyang Jiang
1,5-Diaminonaphthalene functionalized carbon nanodots (DAN-CDs) were explored as a novel matrix for direct detection of small molecules by matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) in negative ion mode. By using DAN-CDs as the matrix, we could detect not only biological small molecules such as fatty acids (FAs), amino acids, peptide Gly–Gly and dopamine, but also anticancer drug erlotinib. By comparison with the performance of CDs, DAN, and their binary matrix, DAN-CDs were favored because of their lower matrix background interference and good detection sensitivity. In addition, the DAN-CDs matrix displayed good salt tolerance and was further applied for plasma detection and qualitative detection of endogenous FAs in a plasma sample. Furthermore, the covalent amide bonds in the DAN-CDs matrix reduced signal interference from the matrix. These results demonstrated that DAN-CDs are a novel negative ion mode matrix for the analysis of small molecules in bio-samples by MALDI-MS.
研究领域:
分析化学
·
生物医学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Yanrong Wang,Chenxi Zheng,Mengfan Zhao,Xuemei Wang,Yaqiong Su,Guowang Diao,Caixing Wang
Electroactive organic materials, characterized by their flexible molecular architecture and rapid reaction kinetics, demonstrate an enormous potential for applications in aqueous zinc-ion batteries (AZIBs). However, small-molecule organic electrode materials often encounter dissolution-induced capacity decay, whereas polymeric counterparts, despite their limited solubility in electrolytes, confront poor conductivity issues. To tackle these challenges, optimizing molecular structures and synthesis routes is paramount. In this study, we have elaborately designed an electrochemical polymerized poly(1,5-diaminonaphthalene), termed PDAN-1, as a high-performance cathode material for AZIBs. Compared to the chemically polymerized counterpart, termed PDAN-2, PDAN-1 exhibits significantly enhanced electrochemical performance, owing to its markedly reduced electrochemical resistance. Specifically, the PDAN-1 cathode achieves a high discharge capacity of 243 mAh g–1 at a current density of 0.1 A g–1. Additionally, it exhibited long-term cycle stability, retaining over 85% of its capacity even after 2700 cycles at 2 A g–1. Impressively, even under a substantial mass loading of 10 mg cm–2, PDAN-1 maintains a discharge capacity of 170 mAh g–1, underscoring its vast potential for practical applications in AZIBs. Furthermore, ex situ analyses and density functional theory calculations collectively reveal that the PDAN-1 cathode operates through a bipolar-type charge storage mechanism, providing insights into its unique electrochemical behavior and further validating its suitability for AZIB applications.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Advanced Powder Materials
·
2024
·
IF 28.6
Miaoran Zhang,Tengyu Yao,Tiezhu Xu,Xinji Zhou,Duo Chen,Laifa Shen
The stable operation of supercapacitors at extremely low temperatures is crucial for applications in harsh environments. Unfortunately, conventional inorganic electrodes suffer from sluggish diffusion kinetics and poor cycling stability for proton pseudocapacitors. Here, a redox-active polymer poly (1,5-diaminonaphthalene) is developed and synthesized as an ultrafast, high-mass loading, and durable pseudocapacitive anode. The charge storage of poly (1,5-diaminonaphthalene) depends on the reversible coordination reaction of the C=N group with H + , which enables fast kinetics associated with surface-controlled reactions. The 3D-printed organic electrode delivers a remarkable areal capacitance (8.43 F cm −2 at 30.78 mg cm −2 ) and thickness-independent rate performance. Furthermore, the 3D-printed proton pseudocapacitor exhibits great low-temperature tolerance and delivers a high energy density of 0.44 mWh cm −2 at −60 °C, as well as operates well even at −80 °C. This work signifies that combining organic material design with 3D hierarchical network electrode construction can provide a promising solution for low-temperature-resistant supercapacitors.
研究领域:
材料科学
·
电化学
·
能源存储
·
功能高分子
·
纳米科技
✓ 已验证
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 16
·9723-9729
·
IF 3.119
Yuchan Ma,Jiao Yang,Tong Yang,Yan Deng,Mengqiao Gu,Min Wang,Rong Hu,Yunhui Yang
C-reactive protein (CRP) has become a recognized indicator of inflammation. CRP concentration in serum is an important indicator for monitoring early heart damage, and it is also a newly discovered coronary heart disease-associated inflammatory factor. A conductive nano-hybrid material composed of Au NPs and ionic liquid functionalized molybdenum disulfide (Au NPs/IL-MoS2) was prepared and utilized to immobilize primary CRP antibodies. Subsequently, 1,5-diaminonaphthalene (DN) was adsorbed onto graphene oxide (GO) through π–π stacking, which was used to load iridium nanoparticles (Ir NPs) as a tag to label secondary CRP antibodies. The large surface area of Au NPs/IL-MoS2 and the excellent electrocatalytic properties of Ir NPs/GO-DN toward the reduction of H2O2 resulted in a highly sensitive assay for CRP antigens. This immunosensor exhibited wide linear ranges from 0.01 to 100 ng mL−1 and a lower detection of limit of 3.3 pg mL−1 (S/N = 3). This CRP immunosensor can be applied in real serum sample analysis with satisfactory results, indicating that the immunosensor has potential applications in biomedical detection.
研究领域:
分析化学
·
生物传感器
·
纳米技术
·
医学诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）