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Effect of Au film and absorption groups on minority carrier life of porous silicon
Yue Zhao,Linjun Wang,Jiahua Min,Weimin Shi 한국물리학회 2010 Current Applied Physics Vol.10 No.3
In this paper, the samples were prepared with or without metal assistance in different time. The effect of Au film and absorption groups on minority carrier life of porous silicon was studied by using l-PCD measurements,and the result was further proved by FTIR spectra and SEM images. The results were showed that the existed hydrogen-related groups on the surface of porous silicon would decrease the minority carrier life and the grid Au film also can decrease the minority carrier life. The minority carrier life may be controlled by the more effective factor, metal elements or absorption groups.
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The effect of Al and B on the luminescent property of porous silicon
Yue Zhao,Zhiyong Lv,Linjun Wang,Jiahua Min,Weimin Shia,Xudong Lu 한국물리학회 2010 Current Applied Physics Vol.10 No.3
In this paper, we studied the PL property and the surface morphology of porous silicon prepared from Ntype single silicon wafers coated with and without Al film. By introducing the Al film on the surface of silicon wafer before etching, the morphology of porous silicon exhibits obvious discrimination compared with that of the conventional porous silicon, which can be explained by the formation mechanism of the samples, and the emission property of two-type porous silicon also showed the clear difference, which may be attributed to the discrepancy in the structural configuration of the samples. Furthermore, it was found that the blue emission decreased and the green emission was almost completely quenched after boron-particle deposition, which is attributed to the structural change or annihilation of the emission defects during annealing process.
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Hongzhe Shi,Wen Zhang,Xingang Bi,Dong Wang,Zejun Xiao,Youyan Guan,Kaopeng Guan,Jun Tian,Hongsong Bai,Linjun Hu,Chuanzhen Cao,Weixing Jiang,Zhilong Hu,Jin Zhang,Yan Chen,Shan Zheng,Xiaoli Feng,Changlin 대한암학회 2021 Cancer Research and Treatment Vol.53 No.4
Purpose Reduced quality of life after cystectomy has made bladder preservation a popular research topic for muscle-invasive bladder cancer (MIBC). Previous research has indicated significant tumor downstaging after neoadjuvant chemotherapy (NAC). However, maximal transurethral resection of bladder tumor (TURBT) was performed before NAC to define the pathology, impacting the real evaluation of NAC. This research aimed to assess real NAC efficacy without interference from TURBT and apply combined modality therapies guided by NAC efficacy. Materials and Methods Patients with cT2-4aN0M0 MIBC were confirmed by cystoscopic biopsy and imaging. NAC efficacy was assessed by imaging, urine cytology, and cystoscopy with multidisciplinary team discussion. Definite responders (≤ T1) underwent TURBT plus concurrent chemoradiotherapy. Incomplete responders underwent radical cystectomy or partial cystectomy if feasible. The primary endpoint was the bladder preservation rate. Results Fifty-nine patients were enrolled, and the median age was 63 years. Patients with cT3-4 accounted for 75%. The median number of NAC cycles was three. Definite responders were 52.5%. The complete response (CR) was 10.2%, and 59.3% of patients received bladder-sparing treatments. With a median follow-up of 44.6 months, the 3-year overall survival (OS) was 72.8%. Three-year OS and relapse-free survival were 88.4% and 60.0% in the bladder-sparing group but only 74.3% and 37.5% in the cystectomy group. The evaluations of preserved bladder function were satisfactory. Conclusion After stratifying MIBC patients by NAC efficacy, definite responders achieved a satisfactory bladder-sparing rate, prognosis, and bladder function. The CR rate reflected the real NAC efficacy for MIBC. This therapy is worth verifying through multicenter research.
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Single-Crystalline Self-Branched Anatase Titania Nanowires for Dye-Sensitized Solar Cells
Zhenquan Li,Huang Yang,Fei Wu,Jianxun Fu,Linjun Wang,Weiguang Yang 대한금속·재료학회 2017 ELECTRONIC MATERIALS LETTERS Vol.13 No.2
The morphology of the anatase titania plays an important role in improving thephotovoltaic performance in dye-sensitized solar cells. In this work, singlecrystallineself-branched anatase TiO2 nanowires have been synthesized byhydrothermal method using TBAH and CTAB as morphology controlling agents. The obtained self-branched TiO2 nanowires dominated by a large percentage of(010) facets. The photovoltaic conversion efficiency (6.37%) of dye-sensitizedsolar cell (DSSC) based on the self-branched TiO2 nanowires shows a significantimprovement (26.6%) compared to that of P25 TiO2 (5.03%). The enhancedperformance of the self-branched TiO2 nanowires-based DSSC is due to heir largepercent of exposed (010) facets which have strong dye adsorption capacity andeffective charge transport of the self-branched 1D nanostructures.
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