Deposited nanohelices on smooth surface: morphology and SERS application
(Conference Presentation)

Yi-Jun Jen; Wei-Chih Liu; Yu-Jie Huang; Yueh Weng Lin

doi:10.1117/12.2238343

2 November 2016 Deposited nanohelices on smooth surface: morphology and SERS application (Conference Presentation)

Yi-Jun Jen, Wei-Chih Liu, Yu-Jie Huang, Yueh Weng Lin

Proceedings Volume 9929, Nanostructured Thin Films IX; 992909 (2016) https://doi.org/10.1117/12.2238343
Event: SPIE Nanoscience + Engineering, 2016, San Diego, California, United States

Abstract

Metal nanohelix arrays have been fabricated using glancing angle deposition. Comparing with method of substrate patterning, nanohelices with average arm width of 32 nm, pitch length of 34 nm and radius of curvature around 12.5 nm grew on a regular seeded layer with period of 79 nm and average seed diameter of 14 nm. In order to mass produce metal nanohelices, smooth substrates were adopted to deposited nanohelix arrays. Due to shadowing effect achieved under substrate cooling, the silver and gold nanohelix arrays could be grown successfully on smooth substrates by well controlling the substrate spin rate with respect to the deposition rate. In this work, the thickness of deposition monitored by quartz monitor was kept at 0.3 nm/s. The substrate was cooled to a low temperature around -10oC. The average arm width, pitch length, radius of curvature and spacer between nanohelices vary with deposition angle are investigated here. The morphology of nanohelix varies with different deposition angles (from 86o to 80o) were also to be investigated. In this work, the average space between adjacent nanohelices and radius of curvature were reduced and increased by increasing the deposition angle, respectively. The average pitch of each nanohelix array was low dependent on the deposition angle. The overlap effect occurs between adjacent nanohelices and the gaps between nanohelices support local field enhancement. The area associated local field enhancement called hot spots. Surface-enhanced Raman scattering (SERS) signals from nanostructured thin films were measured and compared with near-field simulations.

Conference Presentation

Citation Download Citation

Yi-Jun Jen, Wei-Chih Liu, Yu-Jie Huang, and Yueh Weng Lin "Deposited nanohelices on smooth surface: morphology and SERS application (Conference Presentation)", Proc. SPIE 9929, Nanostructured Thin Films IX, 992909 (2 November 2016); https://doi.org/10.1117/12.2238343

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
PRESENTATION

WATCH
PRESENTATION SAVE TO MY LIBRARY

GET CITATION

KEYWORDS

Metals

Nanostructured thin films

Gold

Near field

Optical lithography

Quartz

Raman scattering

Show All Keywords

Keywords/Phrases

Search In:

Publication Years