The uniformity of the protein patterns, their shape, and the contrast between the fluorescence si... more The uniformity of the protein patterns, their shape, and the contrast between the fluorescence signal of the pattern and the background, critically modulate the quantitative accuracy of the microarray-derived data. While significant research focused of the identification of the factors that impact the protein microarray patterns, these studies usually have focused on the optimization of one set of these factors, e.g., how the spot uniformity is affected by different additives, or by different surfaces. However, the complex interaction between proteins, carrier fluids, surfaces, and patterning methodologies used would suggest a systematic and more comprehensive study that considers all these parameters, as well as their inter-relationship. The present work compared the patterning of two fluorescently-tagged proteins, i.e., IgG, BSA, on surfaces with different hydrophobicity and chemistry, and printed by inkjet, pin, and microcontact printing (µCP). The quantification of the spot size...
Biomedical Applications of Micro- and Nanoengineering II, 2005
The demand for polymer-based DNA microarrays will increase because of their cost-effectiveness, b... more The demand for polymer-based DNA microarrays will increase because of their cost-effectiveness, biocompatibility and easy processing. However not all polymers are ideal substrates because of different chemical interactions of polymeric substrates with the DNA molecules. Results from AFM analysis of DNA immobilised on polymeric surfaces are evaluated using fractality, Gaussian distribution and lateral force imaging. It has been found that the nanosize defects in the substrate, such as poly-l-lysine, plays an important role in the growth of DNA aggregates in a vertical direction, whereas the covalent binding of DNA molecules on NHS-functionalised cyclo-olefin copolymer leads to the lateral growth of DNA aggregates.
In a recent trend of micro- and nano-array technologies, polymers are gaining preference over tra... more In a recent trend of micro- and nano-array technologies, polymers are gaining preference over traditional substrates such as glass, silicates, etc. as a model biosurface to immobilize biomolecules. In present paper, we compared model polymeric surfaces such as cyclo olefin copolymer (COC) and polycarbonate (PC), with traditional surfaces such as silicone-wafer and mica. We used a 2D fractal dimension method,
The understanding and control of cell growth in confined microenvironments has application to a v... more The understanding and control of cell growth in confined microenvironments has application to a variety of fields including cell biosensor development, medical device fabrication, and pathogen control. While the majority of work in these areas has focused on mammalian and bacterial cell growth, this study reports on the growth behavior of fungal cells in three-dimensionally confined PDMS microenvironments of a
The absorption of biomolecules on surfaces is a perennial and general problem relevant to fields ... more The absorption of biomolecules on surfaces is a perennial and general problem relevant to fields as different as biomaterials, biosensors, microarrays for proteomics and microfluidics. The 'responsiveness-to-surfaces' character of the proteins augments the difficulty of the general problem of biomolecule adsorption on surfaces. This complexity of protein adsorption generated a large number of contributions over the years, with a rate not showing signs of slowing down. This contribution proposes the use of existent data, as well as data generated in 'programmatic', factorial experiments, to generate scaling relationships regarding protein attachment on polymer surfaces linking protein molecular descriptors, surface descriptors and solution descriptors in a common, quasi-empirical 'engineering' relationships. These relationships can be used for the design of surfaces for proteomics microarrays and microfluidic devices.
Protein molecular motors are natural nano-machines that convert the chemical energy from the hydr... more Protein molecular motors are natural nano-machines that convert the chemical energy from the hydrolysis of adenosine triphosphate into mechanical work. These efficient machines are central to many biological processes, including cellular motion, muscle contraction and cell division. The remarkable energetic efficiency of the protein molecular motors coupled with their nano-scale has prompted an increasing number of studies focusing on their integration in hybrid micro- and nanodevices, in particular using linear molecular motors. The translation of these tentative devices into technologically and economically feasible ones requires an engineering, design-orientated approach based on a structured formalism, preferably mathematical. This contribution reviews the present state of the art in the modelling of protein linear molecular motors, as relevant to the future design-orientated development of hybrid dynamic nanodevices.
SPIE is an international society advancing an interdisciplinary approach to the science and appli... more SPIE is an international society advancing an interdisciplinary approach to the science and application of light. ... Dan V. Nicolau Derek Abbott Kourosh Kalantar-Zadeh Tiziana Di Matteo Sergey M. Bezrukov Editors ... Cosponsored by The Australian National University (Australia) Australian Research Council Nanotechnology Network (Australia) COSNet-ARC Complex Open Systems Research Network (Australia) CUDOS (Australia) RPO (Australia) Bandwidth Foundry (Australia) ... Cooperating Organizations Research School of Physical Sciences and ...
Bright-field, dark-field, Rheinberg, fluorescence microscopy on a mobile phone with phone screen ... more Bright-field, dark-field, Rheinberg, fluorescence microscopy on a mobile phone with phone screen illumination.
The uniformity of the protein patterns, their shape, and the contrast between the fluorescence si... more The uniformity of the protein patterns, their shape, and the contrast between the fluorescence signal of the pattern and the background, critically modulate the quantitative accuracy of the microarray-derived data. While significant research focused of the identification of the factors that impact the protein microarray patterns, these studies usually have focused on the optimization of one set of these factors, e.g., how the spot uniformity is affected by different additives, or by different surfaces. However, the complex interaction between proteins, carrier fluids, surfaces, and patterning methodologies used would suggest a systematic and more comprehensive study that considers all these parameters, as well as their inter-relationship. The present work compared the patterning of two fluorescently-tagged proteins, i.e., IgG, BSA, on surfaces with different hydrophobicity and chemistry, and printed by inkjet, pin, and microcontact printing (µCP). The quantification of the spot size...
Biomedical Applications of Micro- and Nanoengineering II, 2005
The demand for polymer-based DNA microarrays will increase because of their cost-effectiveness, b... more The demand for polymer-based DNA microarrays will increase because of their cost-effectiveness, biocompatibility and easy processing. However not all polymers are ideal substrates because of different chemical interactions of polymeric substrates with the DNA molecules. Results from AFM analysis of DNA immobilised on polymeric surfaces are evaluated using fractality, Gaussian distribution and lateral force imaging. It has been found that the nanosize defects in the substrate, such as poly-l-lysine, plays an important role in the growth of DNA aggregates in a vertical direction, whereas the covalent binding of DNA molecules on NHS-functionalised cyclo-olefin copolymer leads to the lateral growth of DNA aggregates.
In a recent trend of micro- and nano-array technologies, polymers are gaining preference over tra... more In a recent trend of micro- and nano-array technologies, polymers are gaining preference over traditional substrates such as glass, silicates, etc. as a model biosurface to immobilize biomolecules. In present paper, we compared model polymeric surfaces such as cyclo olefin copolymer (COC) and polycarbonate (PC), with traditional surfaces such as silicone-wafer and mica. We used a 2D fractal dimension method,
The understanding and control of cell growth in confined microenvironments has application to a v... more The understanding and control of cell growth in confined microenvironments has application to a variety of fields including cell biosensor development, medical device fabrication, and pathogen control. While the majority of work in these areas has focused on mammalian and bacterial cell growth, this study reports on the growth behavior of fungal cells in three-dimensionally confined PDMS microenvironments of a
The absorption of biomolecules on surfaces is a perennial and general problem relevant to fields ... more The absorption of biomolecules on surfaces is a perennial and general problem relevant to fields as different as biomaterials, biosensors, microarrays for proteomics and microfluidics. The 'responsiveness-to-surfaces' character of the proteins augments the difficulty of the general problem of biomolecule adsorption on surfaces. This complexity of protein adsorption generated a large number of contributions over the years, with a rate not showing signs of slowing down. This contribution proposes the use of existent data, as well as data generated in 'programmatic', factorial experiments, to generate scaling relationships regarding protein attachment on polymer surfaces linking protein molecular descriptors, surface descriptors and solution descriptors in a common, quasi-empirical 'engineering' relationships. These relationships can be used for the design of surfaces for proteomics microarrays and microfluidic devices.
Protein molecular motors are natural nano-machines that convert the chemical energy from the hydr... more Protein molecular motors are natural nano-machines that convert the chemical energy from the hydrolysis of adenosine triphosphate into mechanical work. These efficient machines are central to many biological processes, including cellular motion, muscle contraction and cell division. The remarkable energetic efficiency of the protein molecular motors coupled with their nano-scale has prompted an increasing number of studies focusing on their integration in hybrid micro- and nanodevices, in particular using linear molecular motors. The translation of these tentative devices into technologically and economically feasible ones requires an engineering, design-orientated approach based on a structured formalism, preferably mathematical. This contribution reviews the present state of the art in the modelling of protein linear molecular motors, as relevant to the future design-orientated development of hybrid dynamic nanodevices.
SPIE is an international society advancing an interdisciplinary approach to the science and appli... more SPIE is an international society advancing an interdisciplinary approach to the science and application of light. ... Dan V. Nicolau Derek Abbott Kourosh Kalantar-Zadeh Tiziana Di Matteo Sergey M. Bezrukov Editors ... Cosponsored by The Australian National University (Australia) Australian Research Council Nanotechnology Network (Australia) COSNet-ARC Complex Open Systems Research Network (Australia) CUDOS (Australia) RPO (Australia) Bandwidth Foundry (Australia) ... Cooperating Organizations Research School of Physical Sciences and ...
Bright-field, dark-field, Rheinberg, fluorescence microscopy on a mobile phone with phone screen ... more Bright-field, dark-field, Rheinberg, fluorescence microscopy on a mobile phone with phone screen illumination.
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