Abstract
Although DNA (low-cost, highly transparent, low optical loss, biodegradable, non-toxic, and highly flexible) and gold nanoparticles (Au NPs, exhibiting interband transition and localized surface plasmon resonance) have been intensively studied, DNA with Au NPs in photodetectors is rarely discussed. Here, we constructed salmon DNA (SDNA) thin films and incorporated Au NPs to demonstrate efficient and high-performance UV photodetectors. The Au NP-embedded SDNA thin films were characterized with UV–vis absorption, Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and conductivity measurements in order to understand their physical and chemical properties. The FTIR and XPS measurements elucidated how Au NPs become embedded in SDNA, through analysis of chemical binding and chemical composition. A current increase was observed under UV illumination when performing conductivity measurements. In addition, photovoltage measurements were conducted to investigate the significance of photoresponse and retention characteristics. The density of d-band electrons in Au NPs and the charge carriers in SDNA were observed to increase under UV illumination, followed by a significantly enhanced UV photoresponse. From our observations, the photovoltage displayed a flat response over time, which indicated their stability, durability, and high Au NP retention.
| Original language | English |
|---|---|
| Pages (from-to) | 137-144 |
| Number of pages | 8 |
| Journal | Sensors and Actuators, B: Chemical |
| Volume | 275 |
| DOIs | |
| Publication status | Published - 2018 Dec 1 |
| Externally published | Yes |
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Keywords
- DNA
- Gold nanoparticle
- Interband transition
- Photodetector
- Thin film
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Instrumentation
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Metals and Alloys
- Electrical and Electronic Engineering
- Materials Chemistry
Cite this
Gold nanoparticle-embedded DNA thin films for ultraviolet photodetectors. / Mitta, Sekhar Babu; Reddeppa, Maddaka; Vellampatti, Srivithya; Dugasani, Sreekantha Reddy; Yoo, Sanghyun; Lee, Seungwoo; Kim, Moon Deock; Ha Park, Sung.
In: Sensors and Actuators, B: Chemical, Vol. 275, 01.12.2018, p. 137-144.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Gold nanoparticle-embedded DNA thin films for ultraviolet photodetectors
AU - Mitta, Sekhar Babu
AU - Reddeppa, Maddaka
AU - Vellampatti, Srivithya
AU - Dugasani, Sreekantha Reddy
AU - Yoo, Sanghyun
AU - Lee, Seungwoo
AU - Kim, Moon Deock
AU - Ha Park, Sung
PY - 2018/12/1
Y1 - 2018/12/1
N2 - Although DNA (low-cost, highly transparent, low optical loss, biodegradable, non-toxic, and highly flexible) and gold nanoparticles (Au NPs, exhibiting interband transition and localized surface plasmon resonance) have been intensively studied, DNA with Au NPs in photodetectors is rarely discussed. Here, we constructed salmon DNA (SDNA) thin films and incorporated Au NPs to demonstrate efficient and high-performance UV photodetectors. The Au NP-embedded SDNA thin films were characterized with UV–vis absorption, Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and conductivity measurements in order to understand their physical and chemical properties. The FTIR and XPS measurements elucidated how Au NPs become embedded in SDNA, through analysis of chemical binding and chemical composition. A current increase was observed under UV illumination when performing conductivity measurements. In addition, photovoltage measurements were conducted to investigate the significance of photoresponse and retention characteristics. The density of d-band electrons in Au NPs and the charge carriers in SDNA were observed to increase under UV illumination, followed by a significantly enhanced UV photoresponse. From our observations, the photovoltage displayed a flat response over time, which indicated their stability, durability, and high Au NP retention.
AB - Although DNA (low-cost, highly transparent, low optical loss, biodegradable, non-toxic, and highly flexible) and gold nanoparticles (Au NPs, exhibiting interband transition and localized surface plasmon resonance) have been intensively studied, DNA with Au NPs in photodetectors is rarely discussed. Here, we constructed salmon DNA (SDNA) thin films and incorporated Au NPs to demonstrate efficient and high-performance UV photodetectors. The Au NP-embedded SDNA thin films were characterized with UV–vis absorption, Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and conductivity measurements in order to understand their physical and chemical properties. The FTIR and XPS measurements elucidated how Au NPs become embedded in SDNA, through analysis of chemical binding and chemical composition. A current increase was observed under UV illumination when performing conductivity measurements. In addition, photovoltage measurements were conducted to investigate the significance of photoresponse and retention characteristics. The density of d-band electrons in Au NPs and the charge carriers in SDNA were observed to increase under UV illumination, followed by a significantly enhanced UV photoresponse. From our observations, the photovoltage displayed a flat response over time, which indicated their stability, durability, and high Au NP retention.
KW - DNA
KW - Gold nanoparticle
KW - Interband transition
KW - Photodetector
KW - Thin film
UR - http://www.scopus.com/inward/record.url?scp=85051370272&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85051370272&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2018.07.165
DO - 10.1016/j.snb.2018.07.165
M3 - Article
AN - SCOPUS:85051370272
VL - 275
SP - 137
EP - 144
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
SN - 0925-4005
ER -