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  • Release time: 2018 - 03 - 12
    Ultrathin AAO templates have self-organized honeycomb-like nanopores, and they are usually from several ten nanometers to several hundred nanometers in thickness.Ultrathin AAO templates have been widely used for fabrication of large-scale ordered arrays of surface nanostructures such as nanodots and nanoholes on the surface of substrates. Pores of ultrathin AAO template are uniform in diameter and highly ordered in a short-range. In addition, the material (Al2O3) is transparent in the near-infrared and visible spectrum, and is electrically insulated. Compared to other technology for making ord...
    Ultrathin AAO templates have self-organized honeycomb-like nanopores, and they are usually from several ten nanometers to several hundred nanometers in thickness.Ultrathin AAO templates have been widely used for fabrication of large-scale ordered arrays of surface nanostructures such as nanodots and nanoholes on the surface of substrates. Pores of ultrathin AAO template are uniform in diameter and highly ordered in a short-range. In addition, the material (Al2O3) is transparent in the near-infrared and visible spectrum, and is electrically insulated. Compared to other technology for making ord...
  • Release time: 2018 - 03 - 13
    A new type of AAO product (V-shape AAO) is developed by Topmembranes Technology. Compared to other anodic alumina membranes products, this profile of type of AAO is precisely tailored by the synergistic control of anodizing time, etching time and cyclic times, resulting in a unique structure for a wide range of applications.For more applications of V-shape AAO, please refer to: Adv. Mater. 2014, 26, 2805;ACS Nano, 2015, 9, 10287;Adv. Funct. Mater. 2017, 27, 1604720;Nanoscale Research Letters 2013, 8,268;J. Phys. Chem. C 2017, 121, 9757; Nano Energy, 2016, 22, 539; ACS Nano 2017, 11, 5113. ...
  • Release time: 2018 - 03 - 13
    AAO on Al substrate has honeycomb-like structure (shown in Fig. 1), composed with hexagon column of Al2O3, with a circular pore in the center. At the end of the pore, there is a half-sphere shape barrier layer oxide layer in contact with aluminum. The porous oxide film contains mutually parallel cylindrical pores extending from the barrier oxide layer to the film surface. AAO on Al substrate is the simplest product in AAO family, which can be fabricated into large area with a high success rate. Fig. 2 shows a typical picture of the AAO template.Fig. 1. Schematic of AAO on Al substrate.  F...
  • Release time: 2018 - 03 - 13
    Isotropic AAO templates, often referring to thicker AAO to be different from ultrathin AAO membrane, are widely used for a number of different fields. Topmembranes technology is specialized to make high quality isotropic AAO templates, with highly uniform and regular pore on both sides of the surfaces. The pores are arranged hexagonally within the single grains of the aluminum. The translucent nature of AAO is appealing to applications in biomedical field.Fig. 1. The structure diagram of isotropic AAO templates.Fig. 2. Typical SEM images of both sides of isotropic AAO template. Fig. 3. Ty...
  • Release time: 2018 - 03 - 13
    An sprayer, or airbrush, is an ideal tool for applying a thin layer of material on the substrate.We sell this for your convenience, the price of all set is less than $50. Depending on the amount of your purchase of other product, this airbrush can be free for your use.
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Product Name

SERS chip

Date: 2018-12-27
Author: 36

SERS chip

Raman spectroscopy is widely used in chemistry, materials, physics, polymer, biology, medicine, geology and other fields. Raman spectroscopy contains fingerprint information of the molecule, and Raman detection is simple, rapid and accurate. Therefore, Raman spectroscopy technology has great application prospects in detection. Surface-enhanced Raman scattering (SERS) is a phenomenon in which the Raman scattering signal of the detected molecule is greatly enhanced when it is adsorbed on the surface of rough metal nanostructures. SERS is related to the enhancement of electric field caused by local surface plasmon oscillation of metal nanostructures. With the help of SERS chip, the rapid detection of trace substances, even single molecule detection, can be realized.

SERS chip

Figure 1. SERS chip structure diagram

SERS chip

Figure 2. SERS chip photos


We fabricated gold nanostructures on porous substrates. The SERS chips made of gold material share highly uniform pore structure and nano-size microstructures,and have good stability and long shelf life as well. Solid-state SERS chips are usually attached to standard slide. As shown in Figure 1, the effective region is about 4 *4 mm, the matrix material is alumina, and the excitation wavelength is 633 nm. Based on SERS chip, trace substances can be rapidly analyzed. Typical applications include the detection of harmful substances (such as pesticides, illegal additives) in food, explosives and drugs, etc.

SERS chip


Figure 3. Raman spectra of R6G with a concentration of 10-6M under 633nm excitation 

SERS chip

Figure 4. Raman intensity (@771cm-1) at different locations in the range of 5 *8cm 


As an example, we have tested R6G molecule. SERS chip was immersed in R6G aqueous solution with concentration of 10-6 M for 10-30min, and then dried with nitrogen to test directly. The excitation wavelength is 633 nm, the laser power is 1.3 mW, and the integral time is 5 s. The typical Raman spectra are shown in Figure 3. Raman measurements were carried out at 40 locations of samples with an area of 5 *8 cm (before cutting). The test parameters are the same as those above. The Raman peak at 771 cm-1 changes with position as shown in Fig. 4. 

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