Unveiling facet effects in metallic nanoparticles to design an efficient plasmonic nanostructure

Devaraj, Vasanthan; Lee, Il Hyun; Kim, Minjun; Nguyen, Thanh Mien; Son, Jong Pil; Lee, Jongmin; Lee, Dong Hoon; Kim, Kwang Ho; Oh, Jin Woo

doi:10.1016/j.cap.2022.09.006

Cited by 11 publications

(5 citation statements)

References 61 publications

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“…A three-dimensional (3D) electromagnetic Maxwell solver utilizing the finite-difference time-domain method (FDTD) was employed to carry out optical simulations (ANSYS Lumerical FDTD, Canada) [43,44]. A plane wave source was used to illuminate the plasmonic NP -biomaterial thin film nanostructure (surrounded by air (n = 1) on top) with an incident electric field of E0 (see supporting information or SI figure S1).…”

Section: Three-dimensional Electromagnetic Simulationsmentioning

confidence: 99%

Understanding the Role of M13 Bacteriophage Thin Films on a Metallic Nanostructure Through a Standard and Dynamic Model

Nguyen¹,

Choi²,

Lee³

et al. 2023

Preprint

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The dynamic and surface manipulation of the M13 bacteriophage meeting application demands enable a pathway to design efficient applications with high selectivity and responsivity rate. Herein, we report the role of the M13 bacteriophage thin film layer deposited on an optical nanostructure involving gold nanoparticles/SiO2/Si and its influence on optical and geometrical properties. The thickness of the M13 phage layer was either controlled by varying the concentration or humidity exposure levels, and optical studies were conducted. We designed a standard and dynamic model based upon three-dimensional finite-difference time-domain (3D FDTD) simulations distinguishing the necessity of each model under variable conditions. As seen from the experiments, the origin of respective peak wavelength positions is addressed in detail with the help of simulations. The importance of the dynamic model was noted when humidity-based experiments were conducted. Inexpensive, multi-wavelength optical characteristics from a single structure, reproducibility, and reversible properties are significant advantages of involving M13 bacteriophage. We believe this work will provide fundamental insight into understanding and interpreting the geometrical and optical properties of the nanostructures involving M13 bacteriophage.

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Section: Three-dimensional Electromagnetic Simulationsmentioning

confidence: 99%

Understanding the Role of M13 Bacteriophage Thin Films on a Metallic Nanostructure Through a Standard and Dynamic Model

Nguyen¹,

Choi²,

Lee³

et al. 2023

Preprint

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“…We selected the Au NP diameter "D" as 70 nm, with the interparticle spacing, or "gap", between NPs set at 10 nm. The chosen material's refractive indices were as follows: Johnson and Christy database for gold, Palik database for Si and SiO 2 , and n = 1.37 were applied for M13 bacteriophage [34,45,46].…”

Section: Three-dimensional Electromagnetic Simulationsmentioning

confidence: 99%

Understanding the Role of M13 Bacteriophage Thin Films on a Metallic Nanostructure through a Standard and Dynamic Model

Nguyen

Choi

Lee

et al. 2023

Sensors

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The dynamic and surface manipulation of the M13 bacteriophage via the meeting application demands the creation of a pathway to design efficient applications with high selectivity and responsivity rates. Here, we report the role of the M13 bacteriophage thin film layer that is deposited on an optical nanostructure involving gold nanoparticles/SiO2/Si, as well as its influence on optical and geometrical properties. The thickness of the M13 bacteriophage layer was controlled by varying either the concentration or humidity exposure levels, and optical studies were conducted. We designed a standard and dynamic model based upon three-dimensional finite-difference time–domain (3D FDTD) simulations that distinguished the respective necessity of each model under variable conditions. As seen in the experiments, the origin of respective peak wavelength positions was addressed in detail with the help of simulations. The importance of the dynamic model was noted when humidity-based experiments were conducted. Upon introducing varied humidity levels, the dynamic model predicted changes in plasmonic properties as a function of changes in NP positioning, gap size, and effective index (this approach agreed with the experiments and simulated results). We believe that this work will provide fundamental insight into understanding and interpreting the geometrical and optical properties of the nanostructures that involve the M13 bacteriophage. By combining such significant plasmonic properties with the numerous benefits of M13 bacteriophage (like low-cost fabrication, multi-wavelength optical characteristics devised from a single structure, reproducibility, reversible characteristics, and surface modification to suit application requirements), it is possible to develop highly efficient integrated plasmonic biomaterial-based sensor nanostructures.

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“…Due to the coupling effect between MNPs, the local electric field intensity is higher than that on the surface of single-tip MNPs [18]. Similarly, when MNPs and metal thin films are close to each other to form nanoparticle-on-mirror (NPOM) structures, hot spots with strong local electric field enhancement appear in the gap region between them [19][20][21][22]. The electric field intensity in the gap region of an NPOM structure is greatly enhanced, and at the same time, it is accompanied by the broadening of the resonant spectrum and the shift in the resonant wavelength.…”

Section: Introductionmentioning

confidence: 99%

Polarization-Dependent Plasmon Coupling in Gold Nanoparticles and Gold Thin-Film Systems

Shan,

Zhu,

Huang

2024

Coatings

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The characteristics of gap plasmon formed by nanoparticle-on-mirror (NPOM) structures composed of metal nanoparticles (MNPs) and metal thin films have aroused interest for use in various optoelectronic devices. The resonance enhancement characteristics in the gap region of an NPOM structure composed of gold nanoparticles and gold thin films are simulated theoretically by the finite element method (FEM). The resonant spectrum obtained by the internal coupling effect of the gap can be flexibly controlled by the polarization of incident light and the thickness of the dielectric layer between the MNPs and the metal thin films. We study the resonance spectra of polarization-dependent gold ellipsoidal nanoparticles (GENPs) and gold thin films in the gap region of an NPOM structure. The GENPs and gold thin films are separated by a dielectric layer with a refractive index of 1.36. We observe that the intensity of the resonance electric field in the gap region is inversely proportional to the polarization angle. Similarly, the intensity of the local electric field resonance peak in the gap region is inversely proportional to the thickness of the dielectric layer. When the thickness of the dielectric layer is 0.3 nm and the polarization angle is 0°, the best resonant electric field intensity of 2200 V/m is obtained in the gap region of the NPOM structure (the power of incident light is 1 mW). Finally, the resonant peak wavelength of the electric field in the gap region of the NPOM structure is also controlled by the polarization angle of the incident light and the thickness of the dielectric layer.

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Unveiling facet effects in metallic nanoparticles to design an efficient plasmonic nanostructure

Cited by 11 publications

References 61 publications

Understanding the Role of M13 Bacteriophage Thin Films on a Metallic Nanostructure Through a Standard and Dynamic Model

Understanding the Role of M13 Bacteriophage Thin Films on a Metallic Nanostructure Through a Standard and Dynamic Model

Understanding the Role of M13 Bacteriophage Thin Films on a Metallic Nanostructure through a Standard and Dynamic Model

Polarization-Dependent Plasmon Coupling in Gold Nanoparticles and Gold Thin-Film Systems

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