A well-ordered flower-like gold nanostructure for integrated sensors via surface-enhanced Raman scattering.
A controllable flower-like Au nanostructure array for surface-enhanced Raman scattering (SERS) was fabricated using the combined technique of the top-down approach of conventional photolithography and the bottom-up approach of electrodeposition. Au nanostructures with a mean roughness ranging from 5.1 to 49.6 nm were obtained by adjusting electrodeposition time from 2 to 60 min. The rougher Au nanostructure provides higher SERS enhancement, while the highest SERS intensity obtained with the Au nanostructure is 29 times stronger than the lowest intensity. The SERS spectra of brilliant cresyl blue (BCB), benzenethiol (BT), adenine and DNA were observed from the Au nanostructure.
Kim
Ju-Hyun
JH
Division of Electrical Engineering, School of Electrical Engineering and Computer Science, KAIST, Daejeon 305-701, Korea.
Kang
Taejoon
T
Yoo
Seung Min
SM
Lee
Sang Yup
SY
Kim
Bongsoo
B
Choi
Yang-Kyu
YK
D000225:Adenine / Q000737:chemistry; D015374:Biosensing Techniques / Q000379:methods; D003460:Crystallization; D004247:DNA / Q000737:chemistry; D004563:Electrochemistry; D006046:Gold / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods*; D010078:Oxazines / Q000737:chemistry; D010636:Phenols / Q000737:chemistry; D015203:Reproducibility of Results; D013059:Spectrum Analysis, Raman / Q000379:methods*; D013438:Sulfhydryl Compounds / Q000737:chemistry
D010078:Oxazines; D010636:Phenols; D013438:Sulfhydryl Compounds; C006797:Brilliant Cresyl Blue; D006046:Gold; C042983:thiophenol; D004247:DNA; D000225:Adenine