Article
Chemistry, Physical
Jinling Gao, Wei Zhan, Yuhan Xiao, Xingrui Zhu, Wei Gao, Hong Yin
Summary: In this study, the surface plasmonic coupling between gold nanoparticles and ultrathin boron nitride nanosheets was demonstrated, leading to a significant enhancement of the Raman signal. By varying the size of the nanoparticles, the Raman signal of the nanosheets was improved from 1.7 to 71. The mechanism behind this enhancement was explored through the electromagnetic field coupling strength and charge transfer at the interfaces.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Optics
Songya Cui, Chengxiang Tian, Jikai Mao, Wei Wu, Yongqi Fu
Summary: The switchable multifunctional gold nanopillar array biochemical sensor based on localized surface plasmon resonance (LSPR) allows for measuring a wide variety of spectral signals, including absorption spectra, fluorescence, SPR performance, and SERS. The sensor demonstrates promise potential for in situ biomedical sensing, immunoassay, and cell/molecular spectroscopy applications.
OPTICS COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Rakesh Kumar Saini, Ashok Kumar Sharma, Ajay Agarwal, Rahul Prajesh
Summary: This study presents a complete methodology for simulating a SERS substrate based on nanoparticles and validates the simulation results with experiments. The simulation approach helps in designing and developing a SERS substrate with maximum electromagnetic enhancement at a specific wavelength, and provides insights into the effect of different parameters on the enhancement. Simulating various possibilities before fabrication saves time and money.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Shuwen Chu, Yuzhang Liang, Huizhen Yuan, Li Yu, Qiang Liu, Wei Peng
Summary: Plasmonic nanostructures are highly useful in various applications due to their ability to confine and enhance optical fields. This study proposes and demonstrates a plasmonic nanostructure sensor that utilizes a hexagonal nanopillar array to achieve ultranarrow plasmon resonance coupling. The sensor exhibits a sharp resonance linewidth and demonstrates high sensitivity and precision in bulk refractive index sensing and biomolecular detection.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Jihua Xu, Jinmeng Li, Guangxu Guo, Xiaofei Zhao, Zhen Li, Shicai Xu, Chonghui Li, Baoyuan Man, Jing Yu, Chao Zhang
Summary: The study combined self-organizing process and imprinting technology to construct a cheap and reproducible flexible PVA nanocavity array, enhancing the SERS performance. Experimental results showed the substrate exhibited good mechanical stability in bending experiments and provided stable signals even with light incident from different angles.
Article
Chemistry, Multidisciplinary
Jagannath Gangareddy, Pratyasha Rudra, Manohar Chirumamilla, Sudheer Ganisetti, Subramanian Kasimuthumaniyan, Sourav Sahoo, K. Jayanthi, Jagannath Rathod, Venugopal Rao Soma, Subrata Das, Nitya Nand Gosvami, N. M. Anoop Krishnan, Kjeld Pedersen, Swastik Mondal, Srabanti Ghosh, Amarnath R. Allu
Summary: Metal nanoparticles (MNPs) are stabilized and applied on a newly developed H-glass substrate, offering multifunctional applications such as chemiresistive gas sensing, surface-enhanced Raman spectroscopy, and nonlinear optical absorption. The performance of the MNPs on the H-glass is comparable to existing literature, establishing a facile strategy for advanced material development.
Article
Materials Science, Multidisciplinary
M. Steffi Antony, Rajeshkumar Shankar Hyam
Summary: Gold nanoparticles coated titanium dioxide surface-enhanced Raman scattering (SERS) substrates were fabricated and tested in this study. Amorphous titanium dioxide nanotubes with different geometry were prepared as substrates, and the SERS signal enhancement for the effective detection of rhodamine 6G molecules was studied. The SERS enhancement factor of the substrates was influenced by the geometry of nanotubes and plasmonic photonic interference coupling (P-PIC). The analytical SERS enhancement factor of the substrates was estimated based on reference materials.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Chemistry, Physical
Prabhat Mishra, Anil K. Debnath, Sharmistha Dutta Choudhury
Summary: In this study, thin films of an emerging plasmonic material, TiN, were prepared and characterized. The effectiveness of TiN for fluorescence coupling in metal-dielectric structures was examined. The results showed that TiN substrates have comparable performance to conventional Au substrates for surface plasmon-coupled emission and waveguide-coupled emission. Additionally, the TiN thin films are reusable.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Analytical
Matej Bubas, Ivana Fabijanic, Adriana Kendel, Snezana Miljanic, Maria Chiara Spadaro, Jordi Arbiol, Vesna Janicki, Jordi Sancho-Parramon
Summary: In plasmon-based devices, there is a tradeoff between the superb performance of Ag and the stability of Au in the choice of metal for the nanostructures. This study successfully created hybrid Au-Ag nanoislands with diverse morphology and tunable plasmon resonance using a large-area nanofabrication procedure. The Au-Ag nanoislands exhibited silver-like plasmonic properties and stability over a period of at least 5 months, with significantly higher SERS efficiency than Ag nanoislands. The study also provided insights for future sensor design and showed great potential for biomedicine sensing.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Materials Science, Multidisciplinary
Fangfang Deng, Junxiang Xiang, Ze Liu, Tao Ding
Summary: This study demonstrates a dynamic and reversible tuning of active plasmonic systems with pixelated plasmonic cluster arrays embedded in elastomers. The system is fast, easy to operate, and highly reproducible, showing a prominent and reversible shift of coupled plasmons with stimuli of solvents or mechanical forces. The system can be patterned via laser direct writing, making it applicable in various fields such as high resolution flexible displays, anti-counterfeiting, sensing, and diagnosis.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Physical
Xiaoqian Zang, Xu Shi, Tomoya Oshikiri, Kosei Ueno, Yuji Sunaba, Keiji Sasaki, Hiroaki Misawa
Summary: The researchers developed a plasmon-nanocavity coupling structure using materials such as gold nanoparticles and gold film as a surface-enhanced Raman scattering substrate, which significantly increased the SERS intensity and sensitivity. Their findings showed that the structure could detect crystal violet molecules at concentrations as low as 10(-7) mol/L and exhibit spatially homogeneous SERS signal distribution on the sample, suggesting practical applications in chemical and biomolecule detection devices.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Robert D. Neal, Zachary R. Lawson, Walker J. Tuff, Kaikui Xu, Vishal Kumar, Matiyas T. Korsa, Maksym Zhukovskyi, Matthew R. Rosenberger, Jost Adam, Jordan A. Hachtel, Jon P. Camden, Robert A. Hughes, Svetlana Neretina
Summary: This paper presents a benchtop process for the formation of large-area periodic arrays of gold nanotriangles, addressing the challenge of scaling up the formation of such arrays. The synthesized gold nanotriangles are epitaxially aligned with the substrate, have increased thickness compared to colloidal syntheses, and exhibit atomically flat surface with close-packed gold atoms, resulting in clear and distinct plasmonic modes.
Article
Chemistry, Multidisciplinary
Peng Zheng, Lintong Wu, Piyush Raj, Takayuki Mizutani, Miklos Szabo, William A. Hanson, Ishan Barman
Summary: Small molecules play a crucial role in physiological regulation and pathological diagnosis, but their detection is challenging. Plasmonic immunoassays based on SERS offer high sensitivity, but are limited by intensity fluctuations and false signals. To overcome these issues, a dual-modal single-antibody approach (INSPIRE) is proposed for small molecule detection, which enables better concentration prediction and reduction of signal artifacts.
Article
Chemistry, Multidisciplinary
Jaber Keyvan Rad, Amir Reza Ghomi, Ali Reza Mahdavian
Summary: Photoswitchable nanofibers and nanocomposite fibers with plasmonic nanoparticles were prepared using photochemical and electrospinning techniques. The inclusion of vinylimidazole into the copolymer chains resulted in well-dispersed AuNRs. Photostudies showed a higher reflective intensity for MBVSP@F due to greater chain flexibility. Furthermore, the presence of AuNRs enhanced the photochromic properties of the nanocomposite fibers.
Article
Multidisciplinary Sciences
Lion Augel, Jon Schlipf, Sergej Bullert, Sebastian Buerzele, Joerg Schulze, Inga A. Fischer
Summary: The study investigates crescent-shaped plasmonic nanoapertures near Ge-on-Si PIN nanopillar photodetectors, showing that plasmonic resonances can influence how incident light couples into leaky modes within the nanopillars. This can serve as a starting point to selectively tune device geometries for applications in spectroscopy or refractive index sensing.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Analytical
Nak-hyeon Kim, Soogeun Kim, Munsik Choi, Hyeong-Ho Park, Nam Hoon Kim, Sang Yoon Park, Kyung Min Byun, Soo Yeol Lee
SENSORS AND ACTUATORS B-CHEMICAL
(2018)
Article
Chemistry, Analytical
Samjin Choi, Sang Woong Moon, Seung Ho Lee, Wansun Kim, Soogeun Kim, Su Kang Kim, Jae-Ho Shin, Young-Guk Park, Kyung-Hyun Jin, Tae Gi Kim
SENSORS AND ACTUATORS B-CHEMICAL
(2019)
Article
Nanoscience & Nanotechnology
Soogeun Kim, Tae Gi Kim, Soo Hyun Lee, Wansun Kim, Ayoung Bang, Sang Woong Moon, Jeongyoon Song, Jae-Ho Shin, Jae Su Yu, Samjin Choi
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Spectroscopy
Won Bum Sohn, Soo Yeol Lee, Soogeun Kim
JOURNAL OF RAMAN SPECTROSCOPY
(2020)
Article
Spectroscopy
Soogeun Kim, Young Jin Kim, Ayoung Bang, Wansun Kim, Samjin Choi, Hee Joo Lee
Summary: The study investigated the impact of Raman excitation wavelengths on the surface-enhanced Raman spectroscopy (SERS) for the identification of nontuberculous mycobacteria (NTM). By comparing SERS spectra with three commonly used excitation wavelengths, it was found that NTM species could be distinguished with statistical differences. Utilizing principal components-linear discriminant analysis and leave-one-out cross validation, the study achieved identification accuracies for six NTM species using aromatic amino acid biomarkers at different excitation wavelengths.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Chemistry, Analytical
Soogeun Kim, Jin-Ho Joo, Wansun Kim, Ayoung Bang, Hyung Woo Choi, Sang Woong Moon, Samjin Choi
Summary: A high-performance portable Raman scattering-based sensing platform has been developed for the detection of individual toxic chemicals and simultaneous determination of toxic mixtures with significantly low detection limits for methylene blue and malachite green, as well as good performance in determining individual toxic chemicals in complex aquatic mixtures.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Physical
Hyun-Jung Kim, Ji-Hyun Jang, Sang Uk Woo, Kyoung-Kyu Choi, Sun-Young Kim, Jack L. Ferracane, Jung-Hwan Lee, Dongseok Choi, Samjin Choi, Soogeun Kim, Ayoung Bang, Duck-Su Kim
Summary: The study found that the novel BAG-containing dentin adhesive has the potential to reduce the permeability of demineralized dentin and promote dentin remineralization.
Article
Optics
Ji Hyeon Choi, Munsik Choi, Tien Son Ho, Soogeun Kim, Samjin Choi, Seung Ho Choi, Kyung Min Byun
Summary: A flexible SERS sensor template with nanogap-rich gold nanoislands was fabricated using a silk fibroin film, which showed good detection performance and investigated the effect of surface roughness of the silk substrate on sensor performance.
Article
Biophysics
Wansun Kim, Soogeun Kim, Jisang Han, Tae Gi Kim, Ayoung Bang, Hyung Woo Choi, Gyeong Eun Min, Jae-Ho Shin, Sang Woong Moon, Samjin Choi
Summary: We introduce a label-free surface-enhanced Raman scattering (SERS) biosensing platform that can identify the efficacy of the Oxford-AstraZeneca (AZD1222) vaccine in vaccinated individuals using non-invasive tear samples. The tears of people who receive the AZD1222 vaccine may be similar to those of adenovirus epidemic keratoconjunctivitis patients, as the vaccine is derived from a replication-deficient ChAdOx1 vector of chimpanzee adenovirus. By analyzing the signals from antibodies or immunoglobulin G by-product, we confirmed the potential of three markers for estimating the vaccination status.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Chemistry, Physical
Ji-Hyun Jang, Hyun-Jung Kim, Joo-Young Choi, Hae-Won Kim, Samjin Choi, Soogeun Kim, Ayoung Bang, Duck-Su Kim
Summary: The objective of this study was to evaluate the effect of novel bioactive glass (BAG)-containing desensitizers on dentin permeability. The results showed that desensitizers containing BAG significantly reduced dentin fluid flow rates after two weeks of storage in simulated body fluid. Raman spectroscopy analysis also revealed the formation of hydroxyapatite precipitates on the dentin surface after desensitizer treatment.
Article
Biophysics
Wansun Kim, Ayoung Bang, Soogeun Kim, Gi-Ja Lee, Yeon-Hee Kim, Samjin Choi
Summary: The study demonstrates the successful use of an SERS immunoassay platform based on gold nanotriangles for detecting adiponectin levels in the biofluids of pregnant women, showing a wide assay range, high reliability, and excellent selectivity.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Chemistry, Analytical
Soogeun Kim, Wansun Kim, Ayoung Bang, Jeong-Yoon Song, Jae-Ho Shin, Samjin Choi
Summary: This study introduces a label-free, simple, and high-efficiency breast cancer detection platform with multimodal biomarker analytic algorithms, demonstrating the potential for real-time diagnosis of breast cancer during surgery.
ANALYTICAL METHODS
(2021)
Proceedings Paper
Materials Science, Multidisciplinary
Soogeun Kim, Ayoung Bang, Samjin Choi
NANOENGINEERING: FABRICATION, PROPERTIES, OPTICS, THIN FILMS, AND DEVICES XVI
(2019)
Article
Chemistry, Analytical
Soogeun Kim, Seung Ho Lee, Young Jin Kim, Hee Joo Lee, Samjin Choi
ANALYTICAL METHODS
(2019)
