TH – Page 2 – TechConnect Briefs

Graphene/polyaniline nanocomposite modified electrode for biosensors

Chailapakul O., Yukirdb J., Rodthongkum N., Rangkupan R., Pisitkun T., Chulalongkorn University, TH

A novel system based on graphene/polyaniline nanocomposite modified electrode was successfully developed for sensitive and specific determination of NGAL protein biomarker. Then, the optimum conditions were applied for the detection of NGAL in real biological [...]

Graphene-Loaded Nanofiber-Modified Electrode: A Novel and Sensitive Electrochemical Detection System

Rodthongkum N., Ruecha N., Promphet N., Rangkupan R., Vachet R.W., Chailapakul O., Metallurgy and Materials Science Research Institute, Chulalongkorn University, TH

This work aims to develop a novel electrode based on graphene loaded nanofibers for sensitive electrochemical detection of biomolecules (i.e. dopamine) and heavy metals. The very low limit of detection are obtained for both dopamine [...]

Structural characterization and photocatalytic activity of electrospun TiO2 and Ce-dopedTiO2 nanofibers

Sang-urai S., Worayingyong A., Mansiri S., Smith M.F., Seraphin S., Kasetsart University, TH

Mixed phase TiO2 and Ce-doped TiO2 nanofibers with different content (0.5, 2.0, 8.0%) ofcerium ions were prepared by a sol-gel electro-spinning method. Results from SEM showed nobeads on the undoped-TiO2 and Ce-doped TiO2 nanofibers with [...]

The effect of promoters on reduction of Ru/ZrO2/Co/SiO2 catalyst for Fischer-Tropsch synthesis as studied by in situ XANES.

Kangvansura P., Poo-arporn Y., Schulz H., Worayingyong A., Kasetsart University, TH

AbstractRu/ZrO2/Co/SiO2 was prepared via a co-precipitation and an incipient wetnessimpregnation methods and characterized by XRD and XANES. To study the effect ofpromoters on reduction of active cobalt species on the catalyst, Ru/ZrO2/Co/SiO2,ZrO2/Co/SiO2, Ru/Co/SiO2, and Co/SiO2 [...]

Structural characterization and photocatalytic activity of electrospun TiO2 and Ce-doped TiO2 nanofibers

Sang-urai S., Worayingyong A., Mansiri S., Smith M.F., Seraphin S., Kasetsart University, TH

Mixed phase TiO2 and Ce-doped TiO2 nanofibers with different content (0.5, 2.0, 8.0%) ofcerium ions were prepared by a sol-gel electro-spinning method. Results from SEM showed nobeads on the undoped-TiO2 and Ce-doped TiO2 nanofibers with [...]

The effect of promoters on reduction of Ru/ZrO2/Co/SiO2 catalyst for Fischer-Tropsch synthesis as studied by in situ XANES

Kangvansura P., Poo-arporn Y., Schulz H., Worayingyong A., Kasetsart University, TH

AbstractRu/ZrO2/Co/SiO2 was prepared via a co-precipitation and an incipient wetnessimpregnation methods and characterized by XRD and XANES. To study the effect ofpromoters on reduction of active cobalt species on the catalyst, Ru/ZrO2/Co/SiO2,ZrO2/Co/SiO2, Ru/Co/SiO2, and Co/SiO2 [...]

Immunodiagnosis for cervical cancer using antibody-gold nanoparticle conjugate

Tapaneeyakorn S., Thepthai C., Apiwat N., Dharakul T., National Science and Technology Development Agency, TH

Cervical cancer is a leading cause of cancer deaths among women. It is most often caused by persistent infections with high-risk human papillomavirus (HPV). Since current screening programs are either complex or costly to run, [...]

Triple protection delivery system for retinaldehyde: Preparation, skin penetration and controlled release at the hair follicles

Supmuang P., Wanichwecharungruang S., Chulalongkorn University, TH

Vitamin A and its derivatives including retinaldehyde possess serious instability problem. To continuously supply skin with un-degraded retinaldehyde, nanoparticles which could penetrate into skin via hair follicles and then slowly release this vitamin A derivative [...]

Fabrication of microfluidic system for micro direct alcohol fuel cell: deep X-ray lithography of three-dimensional microstructures on a stainless steel

Yunphuttha C., Pattanakul R., Porntheeraphat S., Wongchaisuwat A., Viravathana P., Kasetsart University, TH

Micro direct alcohol fuel cell, a type of micro fuel cell, is an alternative energy resource which generates electricity without fuel combusting. The micro fuel cell normally contains three parts of microchannels, electrodes, and membrane. [...]

Graphene –modified Carbon Paste Electrode for Cadmium and Lead Monitoring with Flow based System

Chailapakul O., Chuanuwatanakul S., Wonsawat W., Chulalongkorn University, TH

We successfully developed the Bi-GCPE electrode for the determination of Cd2+ and Pb2+ in real sample such as sea bass fish tissue and undulated surf clams tissue by square wave anodic stripping voltammetry. The detection [...]