Au Nanoparticles@Si Nanowire Oligomer Arrays for SERS: Dimers Are Best
Source abstract
Abstract
We report the synthesis of vertically aligned silicon nanowire (VA-SiNW) oligomer arrays coated with Au nanoparticle (NP) monolayers via a combination of colloidal lithography, metal-assisted chemical etching, and directed NP assembly. Arrays of SiNW monomers (i.e., isolated NWs), dimers, and tetramers are synthesized, decorated with AuNPs, and tested for their performance in surface-enhanced Raman spectroscopy. The ∼20 nm AuNPs easily enter within the ca. 40 nm gaps of the SiNW oligomers, thus reaching the hot spot region. At 785 nm excitation, the AuNPs@SiNW dimer arrays provide the highest Raman signal, in agreement with electromagnetic simulations showing a high electric field enhancement at the Au/Si interface within the dimer gap region.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Gold and Silver Nanoparticles Synthesis and Applications · Nanowire Synthesis and Applications · Quantum Dots Synthesis And Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Chemistry and Physics of Materials, University of Salzburg, Jakob Haringer Strasse 2A, A-5020 Salzburg, Austria
Institute of Particle Technology, Friedrich-Alexander University Erlangen-Nürnberg, Cauerstrasse 4, 91058 Erlangen, Germany
Funding
?sterreichischen Akademie der Wissenschaften · Austrian Science Fund · Deutsche Forschungsgemeinschaft
References (67)
Show source-provided references
1. 10.1021/acsenergylett.7b0033310.1021/acsenergylett.7b00333 ↗
2. 10.1021/acsnano.9b0422410.1021/acsnano.9b04224 ↗
3. Maier S. A. · 2007 · 110.1007/0-387-37825-1 ↗
4. 10.3390/bios902005710.3390/bios9020057 ↗
5. 10.1016/j.jare.2010.02.00210.1016/j.jare.2010.02.002 ↗
6. 10.1088/1361-648X/aa60f310.1088/1361-648X/aa60f3 ↗
7. 10.1021/acsanm.2c0190410.1021/acsanm.2c01904 ↗
8. 10.1021/nl049681c10.1021/nl049681c ↗
9. 10.1002/adma.20120284510.1002/adma.201202845 ↗
10. 10.1021/acs.jpcc.6b0050610.1021/acs.jpcc.6b00506 ↗
11. 10.1002/adma.20110349610.1002/adma.201103496 ↗
12. 10.1021/acsami.7b0600210.1021/acsami.7b06002 ↗
13. 10.1021/acsnano.8b0407310.1021/acsnano.8b04073 ↗
14. 10.1021/acs.nanolett.8b0360810.1021/acs.nanolett.8b03608 ↗
15. 10.1021/acsaem.1c0268310.1021/acsaem.1c02683 ↗
16. 10.1007/s11468-017-0605-210.1007/s11468-017-0605-2 ↗
17. 10.1038/s41598-017-04062-410.1038/s41598-017-04062-4 ↗
18. 10.1021/acsnano.6b0677810.1021/acsnano.6b06778 ↗
19. 10.1039/C5TC01820J10.1039/C5TC01820J ↗
20. 10.1063/1.500099410.1063/1.5000994 ↗
21. 10.1021/jp402701810.1021/jp4027018 ↗
22. 10.1038/ncomms891510.1038/ncomms8915 ↗
23. 10.1021/acsphotonics.7b0160410.1021/acsphotonics.7b01604 ↗
24. 10.1063/1.489875810.1063/1.4898758 ↗
25. 10.1126/science.aag247210.1126/science.aag2472 ↗
26. 10.1021/acsphotonics.7b0050110.1021/acsphotonics.7b00501 ↗
27. 10.1038/nmat392110.1038/nmat3921 ↗
28. 10.1021/acs.nanolett.5b0341410.1021/acs.nanolett.5b03414 ↗
29. 10.1364/OL.37.00375610.1364/OL.37.003756 ↗
30. 10.1021/acsami.9b2146610.1021/acsami.9b21466 ↗
31. 10.1021/acs.chemmater.0c0359310.1021/acs.chemmater.0c03593 ↗
32. 10.1515/nanoph-2019-050510.1515/nanoph-2019-0505 ↗
33. 10.1021/nl047990x10.1021/nl047990x ↗
34. 10.1021/ja073125d10.1021/ja073125d ↗
35. 10.1002/adma.20150514410.1002/adma.201505144 ↗
36. 10.1038/s41598-021-99173-410.1038/s41598-021-99173-4 ↗
37. 10.1038/ncomms395010.1038/ncomms3950 ↗
38. 10.1021/nl100161z10.1021/nl100161z ↗
39. 10.1002/adma.20100178410.1002/adma.201001784 ↗
40. 10.1021/acsami.3c0853310.1021/acsami.3c08533 ↗
41. 10.3390/mi1106058910.3390/mi11060589 ↗
42. 10.3390/ma1105078510.3390/ma11050785 ↗
43. 10.1021/nl202303y10.1021/nl202303y ↗
44. 10.1016/j.snb.2008.11.04810.1016/j.snb.2008.11.048 ↗
45. 10.1109/ACCESS.2015.242284210.1109/ACCESS.2015.2422842 ↗
46. 10.1016/j.apsusc.2017.08.18210.1016/j.apsusc.2017.08.182 ↗
47. 10.1039/C1SM06650A10.1039/C1SM06650A ↗
48. 10.1021/cr400081d10.1021/cr400081d ↗
49. 10.1039/D1NA00259G10.1039/D1NA00259G ↗
50. 10.1021/acsami.6b1422610.1021/acsami.6b14226 ↗
51. 10.1039/C8NR07059H10.1039/C8NR07059H ↗
52. 10.1021/acsami.0c1401310.1021/acsami.0c14013 ↗
53. 10.1073/pnas.211339411810.1073/pnas.2113394118 ↗
54. 10.1021/acs.jpcc.1c0869910.1021/acs.jpcc.1c08699 ↗
55. 10.1109/TAP.1966.113869310.1109/TAP.1966.1138693 ↗
56. 10.1021/acsomega.8b0198510.1021/acsomega.8b01985 ↗
57. 10.1039/df951110005510.1039/df9511100055 ↗
58. 10.1002/jrs.92810.1002/jrs.928 ↗
59. 10.1021/nl301840y10.1021/nl301840y ↗
60. 10.1016/0021-9797(68)90272-510.1016/0021-9797(68)90272-5 ↗
61. 10.3390/polym910053910.3390/polym9100539 ↗
62. 10.1021/ja074447k10.1021/ja074447k ↗
63. Laboratory Safety Guideline Piranha Solution 2023 https://www.ehs.harvard.edu/sites/default/files/lab_safety_guideline_piranha_etch.pdf (accessed Oct 20, 2023).
64. 10.1021/la203677810.1021/la2036778 ↗
65. 10.1007/s13404-013-0120-y10.1007/s13404-013-0120-y ↗
66. 10.1038/nmeth.208910.1038/nmeth.2089 ↗
67. Ansys Lumerical FDTD. 2024 https://www.ansys.com/products/optics/fdtd (accessed May 14, 2024).