Dr. Hyung Woo Choi Profile

Dr. Hyung Woo Choi

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 21 February 2020 Presentation + Paper

Improved SERS performance from uniformly distributed Au nanoparticles by tannic acid treatment

Ayoung Bang, Hyung Woo Choi, Soogeun Kim, Samjin Choi

Proceedings Volume 11236, 112360L (2020) https://doi.org/10.1117/12.2545383

KEYWORDS: Nanoparticles, Surface enhanced Raman spectroscopy, Gold, Silicon, Semiconducting wafers, Coating, Raman spectroscopy, Signal processing, Scanning electron microscopy, Biological research

Read Abstract +

Surface enhanced Raman spectroscopy (SERS) is a powerful molecular analytical tool that allows for highly sensitive chemical detection of low concentration analytes through the amplification of electromagnetic (EM) fields generated by the excitation of localized surface plasmons. SERS performance such as enhancement factor (EF), reproducibility and repeatability is highly related to distribution profile of Au nanoparticles on SERS substrates. The uniformity distribution of Au nanoparticles usually results in good SERS performance. We introduce a new SERS substrate that produces improved performance through surface modification of silicon wafers. For this purpose, hydrophilic silicon wafers are prepared and then their surfaces are coated with tannic acid (TA) by thermal treatment. TA is used as a surface modifier with low cost and high adhesion to synthesize uniform and dense Au nanoparticles. The direct synthesis of Au nanoparticles is carried out through the successive ionic layer absorption and reaction (SILAR) method. 2- naphthalenethiol (2-NAT) dye was utilized to confirm the SERS performance of the as-fabricated substrate. The SERS performance was optimized by controlling the thickness of the Au nanoparticle layer synthesized by repeating the SILAR cycle. We expect the proposed SERS substrate to exhibit good reproducibility and repeatability due to the high uniformity distribution of Au nanoparticles.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

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:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years