Jesus Javier Alcantar-Peña

• CIDESI - Divison of Microtechnologies - Manager
• Manager Microtechnologies at Center for Engineering and Industrial Development

This work presents the effect of interpillar distance in a two-step DRIE process for microneedles fabrication. The two-step DRIE process consists of a pillar creation followed by the pillar etching till turning it into a needle. The effect was carried out in a dumbell-well pattern. The employed dumbell-well pattern was adjusted to produce 650 µm mi...

We explore glucose sensitivity as a function of pH in the electrochemical non-enzymatic sensor. The employed sensor consisted of a Cu/CuO working electrode, an Ag/AgCl reference electrode, and a graphite counter electrode. A minimum pH value of 12.5 was determined for glucose sensing in the 0–8 mM range, and the maximum glucose sensitivity of 304 µ...

Gravimeters fabricated with MEMS suffer from temperature-dependent drifts in their long-term stability. We analyze the thermal contributions to the signal, and we propose three mechanisms to mitigate their effects. The first one uses materials that fulfill the condition αE=−2α, where thermal expansion is canceled by the temperature variation of You...

A flexible solid-state potentiometric pH sensor was fabricated in a polyimide substrate with and without ionic gel, KCl/agar electrolyte on the reference electrode. Two electrodes system was fabricated, a reference electrode (Ag/AgCl bilayer by E-beam evaporation and submersion into FeCl3) and a working electrode (indium tin oxide by RF sputtering)...

This article describes key material science/technology issues to implement polycrystalline diamond scaffolds to enable processes for biological cells growth relevant for using cells grown in the laboratory for the treatment of human biological conditions. Issues investigated include 1. Synthesis/characterization of microcrystalline diamond (MCD),...

The present work shows the influence of the isoelectric indirect effect of the semiconductor ZnO in the enzymatic immobilization in a glucose biosensor. For this purpose, thin films based on Au and Au/ZnO were synthesized on a microstructured flexible substrate of polyamide filter membrane (P.F) and characterized by FESEM and XRD. Both flexible sur...

This article documents the design, manufacture, and testing of a silicon inertial optical sensor for low-frequency (lower than 2 kHz) applications. Three accelerometer designs optimized by parameterization using Finite Element Analysis were considered. The accelerometers were manufactured and the one with the highest performance at low frequency wa...

A cellulose microfluidic pH boosting layer adapts a non-enzymatic copper oxide glucose sensor strip for neutral pH samples. This adaptation allows the non-enzymatic technology to realize in-situ glucose measurements. A three-electrode system is constructed to test samples in a classical electrochemical cell, and in a sensing strip to test the micro...

A comprehensive guide to the science of a transformational ultrananocrystalline-diamond (UNCDTM) thin film technology enabling a new generation of high-tech and external and implantable medical devices. Edited and co-authored by a co-originator and pioneer in the field, it describes the synthesis and material properties of UNCDTM coatings and multi...

Thin-film resistive temperature detectors (RTD) are temperature sensors that can be installed on rigid or flexible substrates to meet a wide range of requirements. In this paper, we present a study on the performance of a clinical thermometer and its implementation. The statistical effects of thermal treatment on batch production are presented. Bec...

This paper describes research focused on investigating the effect of hydrogen (H) atom insertion into the grain boundaries of polycrystalline diamond (PCD) films. This is required in order to understand the key morphological, chemical, physical, and electronic properties of the films. The PCD films were grown using the hot filament chemical vapor d...

This paper describes research focused on investigating the effect of hydrogen (H) atom insertion into the grain boundaries of polycrystalline diamond (PCD) films. This is required in order to understand the key morphological, chemical, physical, and electronic properties of the films. The PCD films were grown using the hot filament chemical vapor d...

This paper focuses on describing the integration of ultrananocrystalline diamond (UNCD) coating on pure titanium-based dental implants (DIs) integrated with the surface pre-treatment by chemical-mechanical nano-structuring (CMNS) process. The combination of the UNCD coating with the CMNS metal surface treatment provides a transformational process t...

3-D additive printing technology has been employed recently for the manufacturing of a wide variety of tunable radio frequency (RF) components. In particular, this article is focused on the extraction of magnetically tuned 3-D printed materials suitable for RF circuits. The design and modeling of tunable RF circuits require an accurate electromagne...

Super high-dielectric-constant oxide films for next-generation nanoelectronics and supercapacitors for energy storage - Volume 45 Issue 3 - Orlando Auciello, Geunhee Lee, Chunya Wu, Yuanning Chen, Jesus J. Alcantar-Peña, Israel Mejia, Elida de Obaldía

This paper describes processes developed to change two key electrical properties (electrical resistivity and carrier type) of ultrananocrystalline diamond (UNCD) to microcrystalline diamond (MCD) films. The results show that the electrical properties of the investigated polycrystalline diamond films depend on the grain size and plasma treated grain...

A novel process for Boron doping of ultrananocrystalline diamond (UNCD) films, using thermal diffusion, is described. Hall measurements show an increase in carrier concentration from 10 13 to 10 20 cm −3. Ultraviolet Photoelectron Spectroscopy and x-ray Photoelectron Spectroscopy show a band gap of 4.4 eV, a work function of 5.1 eV and a Fermi leve...

The exceptional combined properties of diamond such as, high hardness, corrosion resistant, high thermal conductivity, chemical inertness, non-toxicity and biocompatibility makes it a good candidate for applications in a new generation of optoelectronics, electronics, and biomedical devices. This paper focuses on describing systematic studies on th...

The growth of polycrystalline diamond films can play an important role in industry if they can be grown on industrially used materials like aluminum (Al) or stainless steel (SS). A critical issue related to the growth of ultrananocrystalline diamond (UNCD) thin films on metals like SS, in a Hydrogen rich environment like the one present during grow...

Polycrystalline diamond films have been and are investigated due to their unique combination of properties such as high wear resistance, highest hardness relative to any other film, lowest friction coefficient compared with metal and ceramic coatings, chemical inertness, excellent thermal conductivity (~1500 W/K·m, close to that of single crystal d...

This paper describes studies to develop hot filament chemical vapor deposition (HFCVD)/Bias Enhance Nucleation-Bias Enhance Growth (BEN-BEG) process for nucleation/grow of relatively large area uniform multifunctional ultrananocrystalline diamond (UNCD) films on tungsten (W)-coated 100 mm diameter silicon substrates, eliminating conventional wet di...

Polycrystalline Diamond Films produced by Hot-Filament Chemical Vapor Deposition - Volume 23 Issue S1 - M.J. Arellano-Jimenez, J. J. Alcantar-Peña, J.E. Ortega Aguilar, M.J. Yacaman, O. Auciello

Las películas delgadas de diamantes no sólo exhiben las propiedades del diamante cristalino, también se pueden utilizar para desarrollar dispositivos electrónicos. Este estudio hace una comparación de tres diferentes estructuras cristalinas de láminas delgadas de diamantes que fueron producidas utilizando métodos de deposición con vapor químico con...

This presentation will discuss our research focused on growing ultrananocrystalline diamond (UNCD), nanocrystalline diamond (NCD) and microcrystalline diamond (MCD) films and integrating them with complimentary materials to fabricate and characterize the electrical performance of Schottky diodes with hydrogenated diamond surfaces, for application t...

This paper describes the results from systematic experiments performed to investigate the influence of different substrate-filaments distances, surface-substrate temperatures and reaction of precursors during the growth of Ultrananocrystalline Diamond (UNCD) films via the hot filament chemical vapor deposition (HFCVD) process. The experimental resu...

This paper describes the science underlying the synthesis and characterization of microcrystalline diamond (MCD) to ultrananocrystalline diamond (UNCD) films on hafnium oxide (HfO2) thin films, grown on flat Si substrates and micro-pillars on Si substrates, for the first time. Using as a novel inter-phase layer for the integration of microcrystalli...

This presentation will provide information on the first demonstration of integration of Ultrananocrystalline Diamond (UNCD) and microcrystalline diamond (MCD) films with HfO2 interface layers on Si, providing a potential pathway for integration of diamond films on modern silicon-based CMOS devices involving HfO2 as the high-k dielectric layer. Alte...

This paper focuses on reporting systematic studies on the effect of the precursor gas chemistry ratio between hydrogen/methane (H2/CH4) and argon (Ar) to tailor control of the grain size, morphology and roughness of large area diamond films. Films ranging from a microcrystalline diamond structure (MCD 1-3 μm grain size) all the way to an ultrananoc...