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Abstract:

A biosensor structure comprising silicon nitride (Si3N 4) micrograting arrays coated with a spin-on-glass (SOG) material was investigated. This grating structure was located on a silicon groove, which was etched by a deep reactive ion etching (DRIE) process. The biosensor was used as a specific detector of DNA molecules and antibody-antigen interactions. In our DNA sensing experiments, the first step was the activation of the grating surface with amine functional groups, followed by attachment of a 23-base oligonucleotide probe layer for hybridization with a complementary target DNA. The sensing device was tested for detecting specific antigen/antibody interactions for human serum albumin (HSA) and antigen bovine serum albumin (BSA). The readout system consisted of a white light lamp that illuminated a small spot on the grating surface at normal incidence through a fiber optic probe with a spectrometer used to collect the reflected light through a second fiber. We show that these sensing devices have the capability to detect DNA as well as antigen-antibody binding for HSA. The detection sensitivity for HSA was better than that for DNA mainly owing to the larger size and concomitant refractive index changes upon binding to the sensor. We show that it is possible to quantify the amount of biomolecules bound to the grating surface by measuring the wavelength shift of the reflectance spectra upon exposure to the samples. © 2011 The Japan Society of Applied Physics.

Registro:

Documento: Artículo
Título:A micrograting sensor for DNA hybridization and antibody human serum Albumin-Antigen human serum albumin interaction experiments
Autor:Chathirat, N.; Atthi, N.; Hruanun, C.; Poyai, A.; Leasen, S.; Osotchan, T.; Hodak, J.H.
Filiación:Materials Science and Engineering Program, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
Thai Microelectronics Center, National Electronics and Computer Technology Center, Chacheongsao 24000, Thailand
Physics Department, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
INQUIMAE-DQIAyQF, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires 1428, Argentina
Palabras clave:Amine functional groups; Antibody-antigen interactions; Antigen-antibody binding; Bovine serum albumins; Deep reactive ion etching; Detection sensitivity; DNA hybridization; DNA molecules; DNA sensing; Fiberoptic probes; Grating structures; Grating surface; Human serum albumins; Micro gratings; Normal incidence; Oligonucleotide probes; Reflectance spectrum; Reflected light; Refractive index changes; Sensing devices; Small spots; Spin-on-glass; Wavelength shift; White light; Antibodies; Antigens; Biosensors; Body fluids; DNA; Experiments; Functional groups; Oligonucleotides; Probes; Reactive ion etching; Refractive index; Silicon nitride; Spin glass; Spinning (fibers); Surfaces; Nucleic acids
Año:2011
Volumen:50
Número:1 PART 3
DOI: http://dx.doi.org/10.1143/JJAP.50.01BK01
Título revista:Japanese Journal of Applied Physics
Título revista abreviado:Jpn. J. Appl. Phys.
ISSN:00214922
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00214922_v50_n1PART3_p_Chathirat

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Citas:

---------- APA ----------
Chathirat, N., Atthi, N., Hruanun, C., Poyai, A., Leasen, S., Osotchan, T. & Hodak, J.H. (2011) . A micrograting sensor for DNA hybridization and antibody human serum Albumin-Antigen human serum albumin interaction experiments. Japanese Journal of Applied Physics, 50(1 PART 3).
http://dx.doi.org/10.1143/JJAP.50.01BK01
---------- CHICAGO ----------
Chathirat, N., Atthi, N., Hruanun, C., Poyai, A., Leasen, S., Osotchan, T., et al. "A micrograting sensor for DNA hybridization and antibody human serum Albumin-Antigen human serum albumin interaction experiments" . Japanese Journal of Applied Physics 50, no. 1 PART 3 (2011).
http://dx.doi.org/10.1143/JJAP.50.01BK01
---------- MLA ----------
Chathirat, N., Atthi, N., Hruanun, C., Poyai, A., Leasen, S., Osotchan, T., et al. "A micrograting sensor for DNA hybridization and antibody human serum Albumin-Antigen human serum albumin interaction experiments" . Japanese Journal of Applied Physics, vol. 50, no. 1 PART 3, 2011.
http://dx.doi.org/10.1143/JJAP.50.01BK01
---------- VANCOUVER ----------
Chathirat, N., Atthi, N., Hruanun, C., Poyai, A., Leasen, S., Osotchan, T., et al. A micrograting sensor for DNA hybridization and antibody human serum Albumin-Antigen human serum albumin interaction experiments. Jpn. J. Appl. Phys. 2011;50(1 PART 3).
http://dx.doi.org/10.1143/JJAP.50.01BK01