兰州大学机构库 >物理科学与技术学院
Debye-length controlled gas sensing performances in NiO@ZnO p-n junctional core-shell nanotubes
Bai, Jinglong1,2; Zhao, Changhui2; Gong, Huimin2; Wang, Qiao1; Huang, Baoyu1; Sun, Gengzhi3; Wang, YR(王妍蓉)1; Zhou, JY(周金元)1; Xie, EQ(谢二庆)1; Wang, Fei2
2019-04-10
Source PublicationJOURNAL OF PHYSICS D-APPLIED PHYSICS   Impact Factor & Quartile Of Published Year  The Latest Impact Factor & Quartile
ISSN0022-3727
EISSN1361-6463
Volume52Issue:28Pages:285103
page numbers9
Abstract

To enhance gas sensing performance, constructing p-n heterostructures are considered as a promising route for designing high-performance gas sensing materials due to their synergistic and p-n junction effects. In particular, the shell layers' thickness often plays a vital role in the modulation of carrier transport during the gas sensing processes. In this work, we have designed a type of NiO@ZnO core-shell nanotube (CSNT) with a thickness-tuneable shell by combining electrospinning with atomic layer deposition (ALD) techniques. The results showed that the NiO@ZnO composite nanofibers possessed a uniform tubular structure and comprised of a 230 nm polycrystalline NiO core and a wrinkled porous ZnO shell with a tuneable thickness (0-50 nm) via ALD cycles. Also, gas sensing tests showed that the NiO@ZnO CSNTs with shell thickness close to the Debye length showed the highest gas sensitivity, e.g. the response to 100 ppm ethanol was 15.8, which is similar to 6.5 times that of the pure NiO. Moreover, the assembled sensors also showed excellent stability (almost keeping 100% after 1 month tests), increased response speed and improved gas selectivity. Furthermore, based on our series of tests and analysis, a possible gas sensing enhancement mechanism (Debye-length controlled gas sensing mechanism) has been proposed for the gas sensing behaviours of our designed sensors based on NiO@ZnO CSNTs.

KeywordNio@zno Core-shell Nanotubes Electrospinning Atomic Layer Deposition P-n Heterojunction Gas Sensors
PublisherIOP
DOI10.1088/1361-6463/ab182f
URL查看原文
Indexed BySCI ; SCIE
Language英语
First Inst
Funding ProjectFundamental Research Funds for the Central Universities[lzujbky-2017-173] ; Fundamental Research Funds for the Central Universities[lzujbky-2018-33]
WOS Research AreaPhysics
WOS SubjectPhysics, Applied
WOS IDWOS:000467683800001
PublisherIOP PUBLISHING LTD
Original Document TypeArticle
DepartmentSchool of Physical Science and Technology, Lanzhou University,
Citation statistics
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/254628
Collection物理科学与技术学院
Corresponding AuthorWang, Qiao
Affiliation
1.Lanzhou Univ, Sch Phys Sci & Technol, 222 South Tianshui Rd, Lanzhou 730000, Gansu, Peoples R China
2.Southern Univ Sci & Technol, Sch Microelect, Shenzhen 518055, Peoples R China
3.Nanjing Tech Univ, Inst Adv Mat, 30 South Puzhu Rd, Nanjing 211816, Jiangsu, Peoples R China
First Author AffilicationSchool of Physical Science and Technology
Corresponding Author AffilicationSchool of Physical Science and Technology
First Signature AffilicationSchool of Physical Science and Technology
Recommended Citation
GB/T 7714
Bai, Jinglong,Zhao, Changhui,Gong, Huimin,et al. Debye-length controlled gas sensing performances in NiO@ZnO p-n junctional core-shell nanotubes[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS,2019,52(28):285103.
APA Bai, Jinglong.,Zhao, Changhui.,Gong, Huimin.,Wang, Qiao.,Huang, Baoyu.,...&Wang, Fei.(2019).Debye-length controlled gas sensing performances in NiO@ZnO p-n junctional core-shell nanotubes.JOURNAL OF PHYSICS D-APPLIED PHYSICS,52(28),285103.
MLA Bai, Jinglong,et al."Debye-length controlled gas sensing performances in NiO@ZnO p-n junctional core-shell nanotubes".JOURNAL OF PHYSICS D-APPLIED PHYSICS 52.28(2019):285103.
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