IEEE SENSORS JOURNAL
·
2024
·
IF 4.3
Yunjie Cao,Xijie Feng,Wenbo Sui,Yufei Shi,Zihan Xie,Xinyan Xian,Jun Wu,Jun Zhou,Jie Dong,Changyu Shen
Mercury is a toxic heavy metal that can easily cause serious harm to human health and the environment. To quickly and sensitively measure the concentration of mercury ions (Hg
2+
), a fiber optic sensor based on Polyacrylamide/2-Thiophenecarboxaldehyde(PAM-TH)-functionalized Mach-Zehnder interferometer (MZI) is proposed and demonstrated experimentally. The prepared modified polyacrylamide and 2-Thiophenecarboxaldehyde are combined by Schiff base reaction to form a three-dimensional network hydrogel with specific binding properties for Hg
2+
. The ultra-sensitive Hg
2+
detection is realized by coating hydrogel on the surface of highly sensitive MZI based on polarization maintaining photonic crystal fiber. The experimental results verify a limit of detection of approximately 0.87 fM, which is two orders better than that of the reported fiber-based Hg
2+
sensors. Through the desorption of mercury ions in the sensor film by ethylenediaminetetraacetic acid (EDTA), the proposed sensor demonstrates good reusability under a wide dynamic detection range from 0.01 pM to 10 nM.
研究领域:
环境科学
·
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 46
·期 5
·2259-2265
·
IF 3.591
Yanting Xu,Ke-Jian Jiang,Pengcheng Wang,Wei-Min Gu,Guang-Hui Yu,Xueqin Zhou,Yanlin Song
3D tin-based halide perovskites are promising light absorbers for perovskite solar cells (PSCs) due to their non-toxicity, suitable optical band gaps, and excellent optoelectronic properties. However, the inherent rapid crystallization and easy oxidation of Sn2+ to Sn4+ in 3D perovskites result in a low power conversion efficiency (PCE) and poor stability of tin perovskite solar cells compared with the lead counterparts. In this report, quasi-2D hybrid tin-based perovskite films are fabricated by using 2-thiopheneethylammonium (TEA+) as the spacer cation in MASnI3 (MA: CH3NH3+), leading to the formation of quasi-2D perovskite films with high orientation and a low content of Sn4+. As a result, the perovskite solar cells show a considerable power-conversion efficiency of 6.8%, which is among the highest values reported for MASnI3-based solar cells. Moreover, the devices exhibited excellent stability compared with the device without TEAI.
研究领域:
材料科学
·
能源技术
·
光伏器件
✓ 已验证
DOI
高影响因子
Carbon Energy
·
2024
·
IF 19.5
Qiurui Wang,Jingwei Zhu,Yuanyuan Zhao,Yijie Chang,Nini Hao,Zhe Xin,Qiang Zhang,Cong Chen,Hao Huang,Qunwei Tang
The buried interface in the perovskite solar cell (PSC) has been regarded as a breakthrough to boost the power conversion efficiency and stability. However, a comprehensive manipulation of the buried interface in terms of the transport layer, buried interlayer, and perovskite layer has been largely overlooked. Herein, we propose the use of a volatile heterocyclic compound called 2-thiopheneacetic acid (TPA) as a pre-buried additive in the buried interface to achieve cross-layer all-interface defect passivation through an in situ bottom-up infiltration diffusion strategy. TPA not only suppresses the serious interfacial nonradiative recombination losses by precisely healing the interfacial and underlying defects but also effectively enhances the quality of perovskite film and releases the residual strain of perovskite film. Owing to this versatility, TPA-tailored CsPbBr 3 PSCs deliver a record efficiency of 11.23% with enhanced long-term stability. This breakthrough in manipulating the buried interface using TPA opens new avenues for further improving the performance and reliability of PSC.
研究领域:
材料科学
·
能源技术
·
化学工程
✓ 已验证
DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 45
·32883-32892
·
IF 3.9
Xuehui Pang,Rui Liu,Xiaoyi Lv,Wenjun Lu,Lebin Sun,Qiuyan Wang,Zhen Li,Qing Kang,Jiandong Xie,Yingxin Pang,Feimeng Zhou
A photoelectrochemical (PEC) sensor based on the poly-2,2,5,2-terthiophene (pTTh)/Cu2O heterojunction was constructed and applied for the detection of long non-coding RNA (lncRNA) TROJAN, a biomarker of triple-negative breast cancer. Cu2O and pTTh were electrodeposited in situ and sequentially onto an indium tin oxide substrate. The bandgap of the resultant type II heterojunction was measured spectroscopically and the morphology was found to effectively separate photogenerated holes from electrons. A photocurrent density as high as 250 μA cm−2 was attained, which is about three times higher than those of only pTTh or Cu2O. Owing to the close contact between pTTh and Cu2O, this PEC sensor is highly stable. Oligonucleotide probes for lncRNA can be cross-linked to carboxyl moieties of mercaptopropionic acid molecules adsorbed on pTTh/Cu2O. The desirable band structure and the high density of probe molecules collectively yielded a linear range of 0.1–10 000 pM. Our PEC sensor has been demonstrated to be amenable for detection of lncRNA markers with excellent analytical performance.
研究领域:
材料科学
·
生物化学
·
分析化学
·
癌症研究
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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）