Synthesis and Optical Properties of Silver Nanowire Arrays Embedded in Anodic Alumina Membrane

Zong, Ruilong; Zhou, Ji; Li, Qi; Du, Binyang; Li, Bo; Fu, Ming; Qi, Xiwei; Li, Longtu; Buddhudu, S.

doi:10.1021/jp0474172

Cited by 198 publications

(122 citation statements)

References 35 publications

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“…In Figure 6a, to clearly compare and emphasize differences, optical absorption curves were normalized with respect to the local maximum corresponding to the green light. The optical absorption peak of AgNRs was shown near around 370 nm (Figure 6a, (i)), which is similar to the reported absorption spectra by Zong et al 20 According to Gan's theory, the optical absorption of AgNRs is associated with geometric factors, especially aspect ratio in which the geometric factors (p) are given by…”

Section: Resultssupporting

confidence: 86%

“…20 The plasmon resonance wavelength is dependent on the aspect ratio. Zong et al 20 showed that the longitudinal resonance wavelength shifted to a longer wavelength with increasing aspect ratio, whereas the transverse resonance wavelength slightly shifted to shorter wavelength with increasing aspect ratio. Thus, AgNRs plasmonic response can depend on their size, shape, dielectric environment.…”

Section: Resultsmentioning

confidence: 99%

“…19 Accordingly, to date, many efforts have been made to study on the incorporation of metallic nanostructures into polymer matrix. [20][21][22][23][24][25][26][27][28][29] However, a strategy for an enhancement in optical absorption based on a precisely controlled fabrication method involving Ag nanostructures and highly ordered porous template remains unreported till now.…”

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confidence: 99%

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Fabrication of Ag Nanorods-Embedded P3HT/PCBM Films for the Enhancement of Light Absorption

Park

Bae

Sohn

et al. 2015

ECS Solid State Letters

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We report a facile method for preparing hybrid nanostructured films composed of poly(3-hexlythiophene) (P3HT) and [6,6]-phenyl-C 61 -butyric acid methyl ester (PCBM) with silver (Ag) nanorods (AgNRs) array. The AgNRs were synthesized by an electrochemical deposition method using an anodic aluminum oxide template with 50-nm-pore-diameter and 10-μm-thickness. The nanostructured P3HT/PCBM film was formed by the intercalation of AgNRs into the P3HT/PCBM film. The nanostructured P3HT/PCBM film with AgNRs showed enhanced optical absorption in the spectral range of 300-650 nm due to localized surface plasmon resonance and scattering effects around the AgNRs compared with spin-coated and nanopatterned P3HT/PCBM films without AgNRs. The design and manipulation of conjugated polymers have been extensively studied in basic science and for a wide range of applications. 1Conjugated polymers have many advantages, such as low production cost, high flexibility, and controllable conductivity, over inorganic materials.2 In addition, the chemical and physical properties of conjugated polymers can be improved by controlling their molecular weight and structure. 3,4 Due to these advantages and the applicability of conjugated polymers, many efforts have been dedicated to the design of chemical structures with specific functionalities, 5 efficient methodologies for synthesis processes, 6 and a suitable structure for optoelectronic applications. 4,7,8 Importantly, one key method for improving the efficiency of photovoltaic devices is to enhance the optical absorption in the organic active layers of these devices. Recent extensive studies on optoelectronic devices have shown that hybrid, nanostructured materials can give rise to remarkably improved energy conversion efficiency via various light-trapping mechanisms and optical absorption enhancement schemes. Moreover, the efficiency of optoelectronic devices largely depends on the structural design of these devices because the incorporation of nanostructures into polymer films offer advantages, such as adjustable material thickness, 1 controllable interfaces, 8 and large surface area, 9 compared to the bulk structure in polymer films. Therefore, many types of nanostructures, including nanoparticles, nanowires, nanotubes, and tetrapods, have been fabricated, and their effectiveness in improving photovoltaic performance has been examined using hybrid material systems. [10][11][12] In particular, the use of a porous template to prepare nanostructures is a promising method that has the advantages of highly regular pore arrays and the ability to control aspects of template geometry, such as pore diameter, pore depth, and inter-pore distance.13 Thus, the design and modification of the surface morphology of polymers using a highly ordered porous template can play an important role in improving efficiency and reducing the production cost of optoelectronic devices, such as organic light-emitting diodes (OLEDs) and organic solar cells. 14,15 Recently, metallic nanostructures have been explored to ...

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Section: Resultssupporting

confidence: 86%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

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Fabrication of Ag Nanorods-Embedded P3HT/PCBM Films for the Enhancement of Light Absorption

Park

Bae

Sohn

et al. 2015

ECS Solid State Letters

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“…The absorption bands near 400 and 700 nm are caused by TSPRs and LSPRs of the Ag nanowire array, respectively. 26,27 As the average Ag www.acsnano.org length increases from ϳ380 to ϳ650 nm (the electrodeposition charge Q increases from 200 to 360 mC), the strength of the LSPRs increases about 60%, but the peak position of the LSPRs slightly blue shifts from 727 to 708 nm. This blue shift of LSPRs is mainly caused by the resonances of higher order plasmon modes in the strongly coupled array of Ag nanowires.…”

Section: Resultsmentioning

confidence: 99%

Plasmon-Mediated Radiative Energy Transfer across a Silver Nanowire Array via Resonant Transmission and Subwavelength Imaging

Zhou

Yang

et al. 2010

ACS Nano

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D irectional control over the excitation energy transfer between different nanosystems is of critical importance for the emerging field of nanophotonics and has various prospective applications ranging from biological detections to quantum information processing. 1Ϫ14 For instance, the excitation energy transfer between semiconductor quantum dots (QDs) is employed to demonstrate quantum operations, 4 and the stimulated interactions between active optical dipoles and surface plasmons are used to generate plasmonic lasing. 5Ϫ8 Comparing with nonradiative energy transfer (such as Dexter and Fö rster processes), 15,16 radiative energy transfer has sufficient distance range but poor efficiency and directionality. The surface plasmons of the exquisitely designing and optimizing metal nanostructures are powerful tools to enhance the efficiency of both radiative and nonradiative energy transfers. 1,17Ϫ19 The Ag films have been used by Andrew et al. to first demonstrate plasmon-mediated radiative energy transfer from donor to acceptor dye molecules over distances longer than 100 nm, 1 which proceeds in three processes, converting optical dipole of the donors to the surface plasmon on one interface of a Ag film, then cross coupling of two surface plasmons on the opposite interfaces of the film, and finally transferring excitation energy to the acceptors on the opposite side. On the basis of this principle, the corrugated nanostructures have been used by Feng et al. to enhance the cross coupling of the two surface plasmons on the opposite interfaces. 17 A two-dimensional (2D) standing metal nanowire array could be a good candidate to assist radiative energy transfer due to its near-field coupling and imaging behaviors. 20,21 The excitation energy of nanoemitters can be efficiently converted to the surface plasmons through strong coupling near the tips of the Ag nanowires, 10 and the corresponding Purcell factor, P (the ratio of the spontaneous emission rate into the plasmon modes over emission into other channels), is predicted to be as high as 10 3 . 22,23 Metal nanorods support both longitudinal and transverse surface plasmon resonances (abbreviated by LSPRs and TSPRs, respectively) by the free electrons near the metal surface oscillating perpendicularly to and along the long axis of the nanorods. Resonant transmission through a Au nanorod array with a far-field excitation is reported by Lyvers et al.,24 which is found to be caused by the half-

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“…Since our silver nanorods are very short at 62 nm, these bands could be assigned simply: the former is due to the transverse mode of the surface plasmon and the latter is due to the longitudinal mode. 32 The transverse mode is slightly red-shifted from approximately 390 to 430 nm when increasing the diameter of silver nanorods from 28 to 51 nm. For example, it is near 430 nm for the nanorods with a 51 nm diameter, while near 390 nm for a 34 nm diameter.…”

Section: Resultsmentioning

confidence: 99%

Diameter Effect of Silver Nanorod Arrays to Surface-enhanced Raman Scattering

Gu¹,

Kim²,

Yoon³

et al. 2014

Bulletin of the Korean Chemical Society

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The effect the diameter of silver nanorod arrays whose distance between the nanorods was uniform at 65 nm have on Surface-enhanced Raman Scattering (SERS) has been studied by varying the diameter from 28 to 51 nm. Nanorod length was fixed at approximately 62 nm, which is the optimum length for SERS by excitation with a 632.8 nm laser line. The transverse and longitudinal modes of the surface plasmon of these silver nanorods were near 400 and 630 nm, respectively. The extinction of the longitudinal mode increased with increasing nanorod diameter, while the transverse mode did not change significantly. High-quality SERS spectra of p-aminothiophenol and benzenethiol adsorbed on the tips of the silver nanorods were observed by excitation with a 632.8 nm laser line. The SERS enhancement increased with increasing nanorod diameter. We concluded that the SERS enhancement increases when the diameter of silver nanorods is increased mainly by increasing the excitation efficiency of the longitudinal mode. The enhancement factor for the silver nanorods with a 51 nm diameter was approximately 2 × 10 7 .

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Synthesis and Optical Properties of Silver Nanowire Arrays Embedded in Anodic Alumina Membrane

Cited by 198 publications

References 35 publications

Fabrication of Ag Nanorods-Embedded P3HT/PCBM Films for the Enhancement of Light Absorption

Fabrication of Ag Nanorods-Embedded P3HT/PCBM Films for the Enhancement of Light Absorption

Plasmon-Mediated Radiative Energy Transfer across a Silver Nanowire Array via Resonant Transmission and Subwavelength Imaging

Diameter Effect of Silver Nanorod Arrays to Surface-enhanced Raman Scattering

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