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Hernando Siy Salapare III

Hernando Siy Salapare III
Air Link International Aviation College · ALIAC Research Office

Doctor of Philosophy (Physics and Chemistry)
Currently looking for a new position as full-time researcher on surface science and materials science.

About

60
Publications
16,887
Reads
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252
Citations
Introduction
Hernando S. Salapare III is a 2016 Balik Scientist Awardee of the Department of Science & Technology, Philippines. In 2013, he obtained a Ph.D. degree in Physics at the University of the Philippines-Diliman and in 2021, he obtained a 2nd Ph.D. degree in Chemistry at the Université Côte d’Azur, France. He is currently the Research Director of Air Link International Aviation College and a Professorial Lecturer at the University of the Philippines Open University.
Additional affiliations
December 2020 - present
Air Link International Aviation College
Position
  • Research Director
Description
  • responsible for providing research and administrative leadership
December 2018 - November 2021
Université Côte d'Azur
Position
  • PhD Student
Description
  • 2nd PhD degree (Doctorat Chimie) ANR BIOSCA Project - BioInspired Oleophobic Self-Cleaning surfaces for Automotive indoor environment with Renault, Faurecia, and Université de Pau as research partners.
September 2017 - June 2019
University of Nice Sophia Antipolis
Position
  • PostDoc Position
Description
  • Collaborative postdoctoral research between the European Space Agency (ESA), UNICE, and an industrial partner.
Education
December 2018 - November 2021
Université Côte d'Azur
Field of study
  • Chemistry
November 2011 - September 2012
University of Nice Sophia Antipolis
Field of study
  • Physics, Chemistry, and Materials Science
June 2010 - April 2013
University of the Philippines
Field of study
  • Physics

Publications

Publications (60)
Article
Poly(tetrafluoroethylene) (PTFE) materials were exposed to low and high-energy oxygen plasma, and the stability of the materials' surface was evaluated using contact angle, surface roughness, and surface chemistry characterizations. Lower-energy oxygen plasma treatments exhibited hydrophilic behavior with contact angles as low as 87°, and the highe...
Article
A facile one-step oxygen plasma irradiation in reactive ion etching (RIE) configuration is employed to Nylon fabrics with different mesh sizes to achieve surface nanostructures and improved wettability for textile and filtration applications. To observe the effects of power and irradiation time on the samples, the experiments were performed using c...
Article
Low-energy hydrogen-ions and tetrafluoromethane-ions produced from a gas discharge ion source were irradiated to poly(ethylene glycol-co-1,3/1,4 cyclohexanedimethanol terephthalate) (PETG) sheets for enhanced paint adhesion. The ion beams were characterized using a cast steel mass spectrometer (CSMS), while the untreated and treated samples were ch...
Article
Full-text available
Taking inspiration from the hydrophilic and superhydrophilic properties observed from the nanostructures present on the leaves of plants such as Alocasia odora, Calathea zebrina, and Ruelia devosiana, we were able to synthesize cupric oxide (CuO) nanostructures from the plasma surface modification of copper (Cu) that exhibits hydrophilic and superh...
Article
Posidonia oceanica samples were exposed to argon and oxygen plasma at varying plasma energies. The untreated and treated samples were characterized to study the weight loss, wettability, surface roughness, and surface chemical functionalities. It was observed that oxygen plasma treatment showed greater weight loss than the argon plasma treatment. S...
Article
A two‐step surface fabrication technique is used to modify the wetting characteristics of copper sheets for heat transfer application. It consists of oxygen plasma treatment that results in the formation of surface nanostructures, and a post‐functionalization process using self‐assembled monolayers. The copper samples are characterized by contact a...
Article
Full-text available
Hydrophobic and oleophobic resistant coatings are realized on nylon and cotton textiles by plasma induced polymerization of modified pyrrole monomers. This process creates a chemical bond between the polymer and the textile fibers for an improved mechanical adherence. A chemical post-grafting with short fluorinated chains gives the non-wetting prop...
Article
Full-text available
Plasma-activated zeolites were used in the removal of diclofenac sodium (DCF) via adsorption in an aqueous solution. The natural zeolites were exposed to 13.56 MHz radio frequency-driven plasma discharge using argon as the working gas. Results have shown an increase in adsorption capacity of DCF to 64% from 52% using the plasma-treated and untreate...
Conference Paper
Full-text available
Plants contain chlorophyll that is known to be a natural photocatalyst since it transforms water and carbon dioxide into oxygen and glucose with the help of sunlight. Taking inspiration from natural photocatalysts, we deposited titanium dioxide (TiO2) thin films on glass substrates using sol-gel and dip coating methods, that acts as a photocatalyti...
Conference Paper
Full-text available
Taking inspiration from the hydrophilic and superhydrophilic properties observed from the nanostructures present on the leaves of plants such as Alocasia odora, Calathea zebrina, and Ruelia devosiana, we were able to synthesized cupric oxide (CuO) nanoparticles from direct plasma surface modification of copper that exhibits hydrophilic properties....
Conference Paper
Polyurethane (PU) foams with negative Poisson’s ratio (NPR) were fabricated by compression molding at 200°C for 25 min. The samples were then exposed to pulsed and continuous RF oxygen plasma produced from a P300 device at varying irradiation times (1-min and 5-min) and powers (100-W, 300-W, 600-W) and at a constant base pressure of 8.0 x 10-2 and...
Conference Paper
Pulsed RF plasma produced in a P300 device1 was used to modify the surface of copper sheets for applications in heat transfer enhancement and water harvesting. The copper sheets were subjected to pulsed RF plasma using oxygen as discharge gas at a constant flow rate of 20 sccm, and at varying irradiation power and irradiation times. Contact angle m...
Conference Paper
ulsed RF plasma produced from a P300 device (Fig. 1) was used for the surface modification of polymeric materials (i.e., polytetrafluoroethylene (PTFE), polycarbonate (PC), and polyethylene terephthalate (PET)) to enhance the properties such as low surface energy, bad adhesion, low wettability, and chemical inertness for applications in textile, au...
Conference Paper
Pharmaceutical wastes are of great concern among emerging contaminants and their excess presence in the environment causes bad effects to any living organisms which have raised the attention for possible impact on human health1. This study focuses on the adsorption of Diclofenac sodium, an emerging contaminant, using RF sub-atmospheric plasma treat...
Conference Paper
Silver nanoparticles (AgNPs) were deposited onto the surface of poly(ethylene glycol-co-1,3/1,4 cyclohexanedimethanol terephthalate) (PETG) material via plasma sputter-type ion source facility (PSTNIS) at base pressure of 3 x 10-5 Torr, operating pressure of 4.5 x 10-4 Torr, discharge voltage of 60 V, discharge current of 1.0 A, target voltage of -...
Thesis
This study is about using a composite of Tungsten Carbide (WC) powder and Styrene-butadiene rubber (SBR) as a gamma radiation shielding material. Eight different types of composite shield samples were fabricated via compression molding process, that is, four configurations of the samples defined based on the different WC:SBR weight ratios (0:1, 0.5...
Article
Titanium dioxide (TiO2) was deposited on polymethylmethacrylate (PMMA) substrates by magnetron sputtering using a Compact Planar Magnetron sputtering device at different flow rate ratios of O2/Ar. The deposited TiO2 on PMMA substrates were characterized using X-ray Diffraction analysis, X-ray Photoelectron Spectroscopy, Fourier Transform Infrared S...
Conference Paper
Full-text available
Poly(tetrafluoroethylene) (PTFE) materials were treated with CF4 plasma produced in a gas discharge ion source (GDIS) to enhance its surface properties, particularly, to achieve stable and robust superhydrophobic surfaces and to enhance the materials’ oleophilic property for biological applications [1]. Fig. 1 shows the schematic diagram of the GDI...
Article
Full-text available
Roughness parameters are traditionally obtained for the surface characterization of microfluidic devices as these are easily computed from height profiles. However, these provide limited topological information on channel geometry needed for fluid flow or fluid retention optimization. In this study, topological measures from Minkowski functionals a...
Conference Paper
Full-text available
Poly(ethylene glycol­co­1,3/1,4 cyclohexanedimethanol terephthalate) (PETG) were treated with oxygen plasma produced in reactive­ion etching configuration of a radiofrequency (RF) BSET EQ NT­1 plasma device (Fig. 1) [1­2] and with low­energy hydrogen­ions and tetrafluoromethane­ions produced from a gas discharge ion source (GDIS) (Fig. 2) [3] to im...
Article
Titanium dioxide (TiO2) particles were deposited on poly(methyl methacrylate) (PMMA) by magnetron sputtering of Ti at varying O2/Ar flow rate ratio and at varying discharge current using a Compact Planar Magnetron (CPM) sputtering device. The deposited TiO2 on PMMA samples were characterized using X-ray photoelectron spectroscopy (XPS), Fourier tra...
Conference Paper
Full-text available
Poly(tetrafluoroethylene) (PTFE) is a polymeric material that is used for a wide variety of applications ranging from electronics, food processing and packaging, agricultural, biomedical, and aeronautical industries due to its excellent properties such as high thermal and chemical stability, exceptional sliding characteristics, outstanding electric...
Conference Paper
Full-text available
Poly(ethylene glycol-co-1,3/1,4 cyclohexanedimethanol terephthalate) (PETG) sheets were surface-modified with oxygen plasma produced in reactive-ion etching configuration of a radiofrequency (RF) BSET EQ NT-1 plasma device [1-2] and with low-energy hydrogen-ions and tetrafluoromethane-ions produced from a gas discharge ion source (GDIS) [3] to enha...
Conference Paper
Full-text available
Poly(ethylene glycol-co-1,3/1,4 cyclohexanedimethanol terephthalate) (PETG) surfaces were microstructured via oxygen plasma produced in reactive ion etching (RIE) configuration of an RF plasma device. The changes on the sample surfaces were determined by water contact angle measurements and profilometry. Surface wettability was enhanced for the pla...
Conference Paper
Several Nobel Prize in Physics, like the works of Gabriel Lippmann (1908) and Pierre-Gilles de Gennes (1991) were awarded in the field of surface and interface science and most of the developed countries like U.S.A., France, Germany, and Japan had invested huge amount of money in the field of theoretical and experimental surface and interface scien...
Conference Paper
Full-text available
Several Nobel Prize in Physics, like the works of Gabriel Lippmann (1908) and Pierre-Gilles de Gennes (1991) were awarded in the field of surface and interface science and most of the developed countries like U.S.A., France, Germany, and Japan had invested huge amount of money in the field of theoretical and experimental surface and interface scien...
Conference Paper
Full-text available
Poly(hexamethylene adiamide) or nylon 6,6 fabrics with different mesh sizes were exposed to oxygen plasma ignited in a reactive ion etching (RIE) configuration to achieve surface nanostructures and nanoporosity and improved wettability for textile and filtration applications [1]. The effects of plasma power and irradiation time on the samples were...
Chapter
Neptune grass (Posidonia oceanica) samples were treated using argon and oxygen plasmas at varying plasma energies that ranged from 6 kJ to 180 kJ. The characterizations done on the samples were weight loss analysis, wettability studies, surface roughness measurements, determination of the surface chemical functionalities, and methyl red dye adsorpt...
Article
Full-text available
Surface etching was achieved by exposing poly(ethylene glycol-co-1,3/1,4 cyclohexanedimethanol terephthalate) (PETG) samples to oxygen plasma produced in reactive ion etching configuration of an RF plasma device. The surface modifications on the sample surfaces were determined by employing water contact angle measurements and profilometry. Enhanced...
Article
Full-text available
Surface etching was achieved by exposing poly(ethylene glycol-co-1,3/1,4 cyclohexanedimethanol terephthalate) (PETG) samples to oxygen plasma produced in reactive ion etching configuration of an RF plasma device. The surface modifications on the sample surfaces were determined by employing water contact angle measurements and profilometry. Enhanced...
Article
Poly(tetrafluoroethylene) (PTFE) were irradiated by CF4 plasma produced in the gas discharge ion source facility to produce stable and robust superhydrophobic surfaces and to enhance the materials' oleophilic property for biological applications. The characterizations employed on the samples are contact angle measurements, analysis of the surfac...
Article
Full-text available
The anti-bacterial property of hydrogen-ion and oxygen-ion treated polytetrafluoroethylene (PTFE) materials is determined using contact angle measurements, scanning electron microscopy (SEM), and Escherichia coli (E. coli) adhesion tests. PTFE samples are irradiated using a gas discharge ion source (GDIS). Ion energies are varied by changing the pl...
Chapter
Full-text available
The porosity and wettability properties of hydrogen ion treated poly(tetrafluoroethylene) (PTFE) materials are related using contact angle, scanning electron microscopy (SEM) and ellipsometry techniques. PTFE samples are irradiated using a low-energy hydrogen ion shower (LEHIS) produced by a Gas Discharge Ion Source (GDIS). The plasma discharge cur...
Article
The wettability and optical transmittance properties of hydrogen ion treated polytetrafluoroethylene (PTFE) materials were evaluated using contact angle, laser irradiation, scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR) tests. The materials were processed using low-energy hydrogen ion shower (LEHIS) produced...
Conference Paper
Full-text available
A contact angle measuring device was developed for undergraduate Physics laboratory experiments. The new device was tested on determining the wettability of waterproof fabrics. Intel® Play™ QX3™ Computer Microscope was used in determining the changes in time of the contact angles of different waterproof fabrics washed in different conditions. At co...

Questions

Questions (2)
Question
Is it possible to measure surface roughness from SEM data? Can you use the power spectral density (PSD) of an SEM image in order to determine the overall surface roughness of a material? Do you need to reconstruct the SEM first before getting the PSD?
Question
When is the best time in determining the surface chemistry of a material after plasma treatment?
Just right after the treatment or 1 day after, etc.? Does ageing affect the surface chemistry of a material like a polymer?

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Cited By

Projects

Projects (3)
Project
The project aims to use plasma chemistry Monte Carlo simulation to model the surface etching of gas discharge plasma on fluoropolymers synthesized from tetrafluoroethylene.
Project
The present study is intended to develop a new lead-free radiation shielding material for gamma radiation using a composite of Tungsten Carbide (WC) powder and Styrene-butadiene rubber (SBR) and to characterize its different properties as a potential suitable alternative for the widely used lead radiation shields.
Project
The Balik Scientist Program (BSP) was established in 1975 to encourage overseas Filipino scientists, professionals and technicians to return or reside in the Philippines, and share their expertise in order to accelerate the scientific, agro-industrial and economic development of the country.