Description
Gold Nanobipyramids
NanoSeedz™ provides gold nanobipyramid products in high purity and high monodispersity. The number percentages of gold nanobipyramids in the products are >95%. The ensemble longitudinal plasmon peak widths are nearly equal to the corresponding single-particle values, suggesting that inhomogeneous peak broadening is eliminated. Moreover, gold nanobipyramids exhibit larger electric field enhancements than gold nanorods. Their refractive index sensitivities and figure-of-merit values are both much larger than those of gold nanorods on the market. Such high-quality gold nanobipyramids are expected to bring tremendous performance improvements in various plasmonic applications, such as high-density optical data storage and high-performance chemical and biological sensing.
|
Part # |
Diameter (nm) |
Length (nm) |
TSPW (nm) |
LSPW (nm) |
Aspect ratio |
|
NBP-20-700-20 |
20 |
55 |
506 ± 5 |
700 ± 5 |
2.7 |
|
NBP-20-700-50 |
20 |
55 |
506 ± 5 |
700 ± 5 |
2.7 |
|
NBP-35-785-20 |
35 |
105 |
513 ± 5 |
785 ± 5 |
3.0 |
|
NBP-35-785-50 |
35 |
105 |
513 ± 5 |
785 ± 5 |
3.0 |
|
NBP-35-815-20 |
35 |
110 |
512 ± 5 |
815 ± 5 |
3.1 |
|
NBP-35-815-50 |
35 |
110 |
512 ± 5 |
815 ± 5 |
3.1 |
|
NBP-45-850-20 |
45 |
140 |
517 ± 5 |
850 ± 5 |
3.1 |
|
|
45 |
140 |
|
|
3.1 |
The diameter is measured at the waist. The length is measured between the two opposite tips. TSPW and LSPW refer to the transverse and longitudinal surface plasmon wavelength, respectively. The aspect ratio is the length-to-diameter ratio.
|
Part # |
OD (per cm at LSPW) |
Price (USD) |
|
NBP-20-700-20 |
2 |
268 |
|
NBP-20-700-50 |
5 |
488 |
|
NBP-35-785-20 |
2 |
268 |
|
NBP-35-785-50 |
5 |
488 |
|
NBP-35-815-20 |
2 |
248 |
|
NBP-35-815-50 |
5 |
448 |
|
NBP-45-850-20 |
2 |
248 |
|
|
5 |
448 |
All gold nanobipyramid products are delivered in a volume of 10 mL.
The Au nanobipyramid solutions exhibit strong extinction in the near-infrared range. The extinction value at the longitudinal surface plasmon wavelength (LSPW) is proportional to the gold nanobipyramid particle concentration. We therefore use optical density (OD, extinction per 1 cm at the longitudinal surface plasmon wavelength) to indicate the amount of the active ingredient gold nanobipyramids in our products. The optical densities are measured on a UV/visible/NIR spectrometer.
Many gold nanoparticle products often have their optical densities at 1, with the corresponding mass concentration of gold being ~0.001 wt%. To increase the content of the active ingredients and more importantly, to save our customers’ time and cost for concentrating samples before use, we have concentrated our samples in advance to remove excessive water and surfactants. Our products have much higher mass concentrations of gold and stronger peak extinction values. Users can dilute the products easily using deionized water. Each sold batch of our products is labeled according to its volume and OD.
Delivery
All products will be shipped in three days after receiving the payment. The items will be shipped by Hong Kong Post for international orders. For example, it will typically take one week to ship the products from Hong Kong to the major cities in USA by Hong Kong Post. For orders from Mainland China and Hong Kong SAR, we will send products by land express due to the air-traffic control in Mainland China.
Selected references for gold nanobipyramids
(1) X. L. Zhuo, X. Z. Zhu, Q. Li, Z. Yang, J. F. Wang, “Gold nanobipyramid-directed growth of length-variable silver nanorods with multipolar plasmon resonances”, ACS Nano 2015, 9, 7523-7535.
(2) J.-H. Lee, K. J. Gibson, G. Chen, Y. Weizmann, “Bipyramid-templated synthesis of monodisperse anisotropic gold nanocrystals”, Nat. Comm. 2015, 6, 7571.
(3) Q. Li, X. L. Zhuo, S. Li, Q. F. Ruan, Q.-H. Xu, J. F. Wang, “Production of monodisperse gold nanobipyramids with number percentages approaching 100% and evaluation of their plasmonic properties”, Adv. Opt. Mater. 2015, 3, 801-812.
(4) L. Zhou, Z. K. Liu, H. Zhang, S. Cheng, L.-J. Fan, W. L. Ma, “Site-specific growth of AgPd nanodendrites on highly purified Au bipyramids with remarkable catalytic performance”, Nanoscale 2014, 6, 12971-12980.
(5) W. J. Liu, D. Liu, Z. N. Zhu, B. Han, Y. Gao, Z. Y. Tang, “DNA induced intense plasmonic circular dichroism of highly purified gold nanobipyramids”, Nanoscale 2014, 6, 4498-4502.
(6)
(7) K. M. Mayer, F. Hao, S. Lee, P. Nordlander, J. H. Hafner, “A single molecule immunoassay by localized surface plasmon resonance”, Nanotechnology 2010, 21, 255503.
(8) M. Pelton, J. E. Sader, J. Burgin, M. Z. Liu, P. Guyot-Sionnest, D. Gosztola, “Damping of acoustic vibrations in gold nanoparticles”, Nat. Nanotechnol. 2009, 4, 492-495.
(9) S. Lee, K. M. Mayer, J. H. Hafner, “Improved localized surface plasmon resonance immunoassay with gold bipyramid substrates”, Anal. Chem. 2009, 81, 4450-4455.
(10)
(11)
(12) X. S. Kou, W. H. Ni, C.-K. Tsung, K. Chan, H.-Q. Lin, G. D. Stucky, J. F. Wang, “Growth of gold bipyramids with improved yield and their curvature-directed oxidation”, Small 2007, 3, 2103-2113.
(13) X. S. Kou, S. Z. Zhang, C.-K. Tsung, M. H. Yeung, Q. H. Shi, G. D. Stucky, L. D. Sun, J. F. Wang, C. H. Yan, “Growth of gold nanorods and bipyramids using CTEAB surfactant”, J. Phys. Chem. B 2006, 110, 16377-16383.
(14) M. Z. Liu, P. Guyot-Sionnest, “Mechanism of silver(I)-assisted growth of gold nanorods and bipyramids”, J. Phys. Chem. B 2005, 109, 22192-22200.