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| 2. |
- Luo, Zhixun, et al.
(författare)
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Potential-induced Raman behavior of individual (R)-di-2-naphthylprolinol molecules on a Ag-modified Ag electrode
- 2011
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Ingår i: Journal of Raman Spectroscopy. - : Wiley. - 0377-0486 .- 1097-4555. ; 42:5, s. 951-957
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Tidskriftsartikel (refereegranskat)abstract
- The applicability of surface-enhanced Raman spectroscopy is demonstrated to probe the adsorption behavior of individual molecules on a Ag electrode. High-quality SERS spectra of (R)-di-2-naphthylprolinol (DNP) were obtained from ultradilute solutions (10(-12) M) on the Ag-nanoparticle-modified Ag electrode, which is attributed to the high electromagnetic (EM) effect of the SERS-active system as well as to the strong adsorption and interaction of DNP molecules with Ag. The stable SERS spectra present remarkable potential dependence, which gives evidence for the behavior of individual DNP molecules on the Ag surface. Based on statistical analysis for the probability of DNP molecules located in 'hot spots', we propose an SERS mechanism for individual molecules in the electrode system, in combination with the hot-spot model and orientation of the probemolecules.
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| 3. |
- Luo, Zhixun, et al.
(författare)
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Stabilizing single-molecular Raman spectrum of a nonbonding molecule on Ag nanoparticles
- 2009
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Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1359-7345 .- 1364-548X. ; :11, s. 1342-1344
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The applicability of single-molecule surface-enhanced Raman spectroscopy to a nonbonding molecular system is demonstrated on a uniformly assembled colloidal Ag nanoparticle substrate.
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| 4. |
- Ding, Huaiyi, et al.
(författare)
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Maximizing Integrated Optical and Electrical Properties of a Single ZnO Nanowire through Native Interfacial Doping
- 2014
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Ingår i: Advanced Materials. - : Wiley. - 0935-9648 .- 1521-4095. ; 26:19, s. 3035-3041
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Tidskriftsartikel (refereegranskat)abstract
- A native interfacial doping layer introduced in core-shell type ZnO nanowires by a simple vapor phase re-growth procedure endows the produced nanowires with both excellent electrical and optical performances compared to conventional homogeneous ZnO nanowires. The unique Zn-rich interfacial structure in the core-shell nanowires plays a crucial role in the outstanding performances.
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| 5. |
- Liu, Jinyang, et al.
(författare)
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Fabrication of Graphene Nanomesh and Improved Chemical Enhancement for Raman Spectroscopy
- 2012
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Ingår i: The Journal of Physical Chemistry C. - : American Chemical Society (ACS). - 1932-7447 .- 1932-7455. ; 116:29, s. 15741-15746
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Tidskriftsartikel (refereegranskat)abstract
- We propose a new approach to fabricate the graphene nanomesh through the local catalytic hydrogenation of carbon by Cu nanoparticles. It allows to tune the size and density of the holes in the nanomesh as well as the total edge length of the holes through the control of the thickness of the Cu film. The upshift of both G and 2D peaks in Raman spectra of the graphene nanomeshes indicates that the nanomesh is spontaneously p-type doped. Moreover, the split of G peak reveals that the doping is localized near the edge region of the hole in the nanomesh. Importantly, the nanomesh shows improved chemical enhancement for Raman spectra of absorbed RhB molecules as compared to the graphene. The edges in the nanomesh can enhance Raman spectroscopy via increasing both the local charge transfer and the ability to absorb RhB molecules. The results show that the graphene nanomesh has a great potential for the rapid and sensitive detection for the environmental monitoring and food security.
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| 6. |
- Xue, Ru, et al.
(författare)
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Variations of methane fluxes and methane microbial community composition with soil depth in the riparian buffer zone of a sponge city park
- 2023
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Ingår i: Journal of Environmental Management. - : Elsevier. - 0301-4797 .- 1095-8630. ; 339
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Tidskriftsartikel (refereegranskat)abstract
- Riparian buffers benefit both natural and man-made ecosystems by preventing soil erosion, retaining soil nu-trients, and filtering pollutants. Nevertheless, the relationship between vertical methane fluxes, soil carbon, and methane microbial communities in riparian buffers remains unclear. This study examined vertical methane fluxes, soil carbon, and methane microbial communities in three different soil depths (0-5 cm, 5-10 cm, and 10-15 cm) within a riparian buffer of a Sponge City Park for one year. Structural equation model (SEM) results demonstrated that vertical methane fluxes varied with soil depths (lambda =-0.37) and were primarily regulated by methanogenic community structure (lambda = 0.78). Notably, mathematical regression results proposed that mcrA/ pmoA ratio (R2 = 0.8) and methanogenic alpha diversity/methanotrophic alpha diversity ratio (R2 = 0.8) could serve as valid predictors of vertical variation in methane fluxes in the riparian buffer of urban river. These findings suggest that vertical variation of methane fluxes in riparian buffer soils is mainly influenced by carbon inputs and methane microbial abundance and community diversity. The study's results quantitatively the relationship between methane fluxes in riparian buffer soils and abiotic and biotic factors in the vertical di-rection, therefore contributing to the further development of mathematical models of soil methane emissions.
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