Femtomolar-Level Molecular Sensing of Monolayer Tungsten Diselenide Induced by Heteroatom Doping with Long-Term Stability

Lv, Qian1; Tan, Junyang2; Wang, Zhijie2; Yu, Lingxiao1; Liu, Bilu2; Lin, Junhao3; Li, Jia2,4; Huang, Zheng-Hong1,5; Kang, Feiyu1,2,4,5; Lv, Ruitao1,5

2022-06-01

10.1002/adfm.202200273

ADVANCED FUNCTIONAL MATERIALS   Impact Factor & Quartile

1616-301X

1616-3028

Surface-enhanced Raman scattering (SERS) is a sensitive, fast, and nondestructive technology to detect trace amounts of molecules. The development of ultrasensitive and environmentally stable noble-metal-free SERS substrates is crucial for practical applications but still very challenging. In this contribution, an in situ substitutional doping strategy to synthesize Re-doped WSe2 (Re-WSe2) with different doping levels is reported. By increasing the Re content to approximate to 50 at%, the Re-WSe2 alloy inherits the 1T '' phase of the ReSe2 lattice. Furthermore, Nb atoms are doped into the 1T '' Re-WSe2 alloy to further modulate its electronic structure. The as synthesized 1T '' Nb, Re-WSe2 demonstrates a femtomolar-level molecular sensing capability with a detectable concentration of 5 x 10(-15) m and the corresponding enhancement factor is 2.0 x 10(9), which is superior to that of most non-noble-metal SERS substrates and comparable or even superior to that of noble-metal substrates to the best of the authors' knowledge. More importantly, the as-synthesized 1T '' Nb, Re-WSe2 exhibits excellent air-stability over a long term (approximate to 6 months) and selective detection capability in the mixed molecular solution, which are essential for their practical applications. The work provides a new strategy for the rational design of noble-metal-free SERS substrates to achieve ultrasensitive molecular sensing.

2D materials air-stability molecular sensing phase modulation substitutional doping

SCI ; EI

English

NI Journal Papers

Others

National Key Research and Development Program of China[2021YFA1200800] ; National Natural Science Foundation of China[51972191,52172047] ; Guangdong Innovative and Entrepreneurial Research Team Program[2019ZT08C044] ; Shenzhen Science and Technology Program[KQTD20190929173815000]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000812472300001

WILEY-V C H VERLAG GMBH

20222512247360

Electronic structure ; Monolayers ; Raman scattering ; Selenium compounds ; Substrates ; Surface scattering ; Tungsten compounds

Precious Metals:547.1 ; Light/Optics:741.1 ; Classical Physics; Quantum Theory; Relativity:931

MATERIALS SCIENCE

Web of Science

1.Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
2.Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Shenzhen Geim Graphene Ctr, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
4.Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Guangdong Prov Key Lab Thermal Management Engn &, Shenzhen 518055, Peoples R China
5.Tsinghua Univ, Sch Mat Sci & Engn, Key Lab Adv Mat MOE, Beijing 100084, Peoples R China

Lv, Qian,Tan, Junyang,Wang, Zhijie,et al. Femtomolar-Level Molecular Sensing of Monolayer Tungsten Diselenide Induced by Heteroatom Doping with Long-Term Stability[J]. ADVANCED FUNCTIONAL MATERIALS,2022,32.

Lv, Qian.,Tan, Junyang.,Wang, Zhijie.,Yu, Lingxiao.,Liu, Bilu.,...&Lv, Ruitao.(2022).Femtomolar-Level Molecular Sensing of Monolayer Tungsten Diselenide Induced by Heteroatom Doping with Long-Term Stability.ADVANCED FUNCTIONAL MATERIALS,32.

Lv, Qian,et al."Femtomolar-Level Molecular Sensing of Monolayer Tungsten Diselenide Induced by Heteroatom Doping with Long-Term Stability".ADVANCED FUNCTIONAL MATERIALS 32(2022).