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  • Journal article
    Al-Ahdal A, Toumazou C, 2012,

    High gain ISFET based νMOS chemical inverter

    , SENSORS AND ACTUATORS B-CHEMICAL, Vol: 171, Pages: 110-117
  • Journal article
    Sanni A, Vilches A, Toumazou C, 2012,

    Inductive and Ultrasonic Multi-Tier Interface for Low-Power, Deeply Implantable Medical Devices

    , IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS, Vol: 6, Pages: 297-308, ISSN: 1932-4545
  • Journal article
    Trantidou T, Prodromakis T, Toumazou C, 2012,

    Oxygen plasma induced hydrophilicity of Parylene-C thin films

    , Applied Surface Science, Vol: 261, Pages: 43-51, ISSN: 1873-5584

    This paper investigates the surface modification of Parylene-C thin films under various oxygen plasma treatment conditions, such as power intensity (50:400 W) and exposure time (1:20 min). The extent of hydrophilicity was investigated through contact angle measurements, and correlations between treatment parameters, film thickness, restoration of hydrophobicity and etching rates were experimentally established. We also demonstrate the selective modification of Parylene-C films, facilitating distinct hydrophilic and hydrophobic areas with μm-resolution that can be exploited in self-alignment applications.
  • Journal article
    Lui KW, Murphy OH, Toumazou C, 2012,

    32-mu W Wirelessly-Powered Sensor Platform With a 2-m Range

    , IEEE SENSORS JOURNAL, Vol: 12, ISSN: 1530-437X
  • Journal article
    Mou Z, Triantis IF, Woods VM, Toumazou C, Nikolic Ket al., 2012,

    A Simulation Study of the Combined Thermoelectric Extracellular Stimulation of the Sciatic Nerve of the <i>Xenopus Laevis</i>: The Localized Transient Heat Block

    , IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, Vol: 59, Pages: 1758-1769, ISSN: 0018-9294
  • Journal article
    Prodromakis T, Toumazou C, Chua LO, 2012,

    Two centuries of memristors

    , Nature Materials, Vol: 11, Pages: 478-481
  • Journal article
    Lui KW, Murphy OH, Toumazou C, 2012,

    32-μW Wirelessly-Powered Sensor Platform With a 2-m Range

    , IEEE SENSORS JOURNAL, Vol: 12, Pages: 1919-1924, ISSN: 1530-437X
  • Journal article
    Liu Y, Al-Ahdal A, Georgiou P, Toumazou Cet al., 2012,

    Minimal readout scheme for ISFET sensing arrays based on pulse width modulation

    , ELECTRONICS LETTERS, Vol: 48, Pages: 548-U28, ISSN: 0013-5194
  • Journal article
    AlAhdal A, Toumazou C, 2012,

    ISFET-based chemical Schmitt trigger

    , ELECTRONICS LETTERS, Vol: 48, Pages: 549-550, ISSN: 0013-5194
  • Journal article
    Al-Ahdal A, Toumazou C, 2012,

    ISFET-Based Chemical Switch

    , IEEE SENSORS JOURNAL, Vol: 12, Pages: 1140-1146, ISSN: 1530-437X
  • Journal article
    Gelencsér A, Prodromakis T, Toumazou C, Roska Tet al., 2012,

    Biomimetic model of the outer plexiform layer by incorporating memristive devices.

    , Phys Rev E Stat Nonlin Soft Matter Phys, Vol: 85

    In this paper we present a biorealistic model for the first part of the early vision of processing by incorporating memristive nanodevices. The architecture of the proposed network is based on the organization and functioning of the outer plexiform layer (OPL) in the vertebrate retina. We demonstrate that memristive devices are indeed a valuable building block for neuromorphic architectures, as their highly nonlinear and adaptive response could be exploited for establishing ultradense networks with dynamics similar to that of their biological counterparts. We particularly show that hexagonal memristive grids can be employed for faithfully emulating the smoothing effect occurring in the OPL to enhance the dynamic range of the system. In addition, we employ a memristor-based thresholding scheme for detecting the edges of grayscale images, while the proposed system is also evaluated for its adaptation and fault tolerance capacity against different light or noise conditions as well as its distinct device yields.
  • Journal article
    Murphy OH, McLeod CN, Navaratnarajah M, Yacoub M, Toumazou Cet al., 2012,

    A Pseudo-Normal-Mode Helical Antenna for Use With Deeply Implanted Wireless Sensors

    , IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, Vol: 60, Pages: 1135-1139, ISSN: 0018-926X
  • Journal article
    Kalofonou M, Georgiou P, Ou C-P, Toumazou Cet al., 2012,

    An ISFET based translinear sensor for DNA methylation detection

    , SENSORS AND ACTUATORS B-CHEMICAL, Vol: 161, Pages: 156-162
  • Journal article
    Herrero P, Bondia J, Palerm CC, Vehí J, Georgiou P, Oliver N, Toumazou Cet al., 2012,

    A simple robust method for estimating the glucose rate of appearance from mixed meals.

    , J Diabetes Sci Technol, Vol: 6, Pages: 153-162

    BACKGROUND: Estimating the rate of glucose appearance (R(a)) after ingestion of a mixed meal may be highly valuable in diabetes management. The gold standard technique for estimating R(a) is the use of a multitracer oral glucose protocol. However, this technique is complex and is usually not convenient for large studies. Alternatively, a simpler approach based on the glucose-insulin minimal model is available. The main drawback of this last approach is that it also requires a gastrointestinal model, something that may lead to identifiability problems. METHODS: In this article, we present an alternative, easy-to-use method based on the glucose-insulin minimal model for estimation of R(a). This new technique avoids complex experimental protocols by only requiring data from a standard meal tolerance test. Unlike other model-based approaches, this new approach does not require a gastrointestinal model, which leads to a much simpler solution. Furthermore, this novel technique requires the identification of only one parameter of the minimal model because the rest of the model parameters are considered to have small variability. In order to account for such variability as well as to account for errors associated to measurements, interval analysis has been employed. RESULTS: The current technique has been validated using data from a United States Food and Drug Administration-accepted type 1 diabetes simulator [root mean square error (RMSE) = 0.77] and successfully tested with two clinical data sets from the literature (RMSE = 0.69). CONCLUSIONS: The presented technique for the estimation of R(a) showed excellent results when tested with simulated and actual clinical data. The simplicity of this new technique makes it suitable for large clinical research studies for the evaluation of the role of R(a) in patients with impairments in glucose metabolism. In addition, this technique is being used to build a model library of mixed meals that could be incorporated into diabetic su
  • Conference paper
    Al-Ahdal A, Georgiou P, Toumazou C, 2012,

    ISFET’s threshold voltage control using bidirectional electron tunnelling

    , Pages: 172-175
  • Conference paper
    Wang K, Liu Y, Toumazou C, Georgiou Pet al., 2012,

    A TDC based ISFET readout for large-scale chemical sensing systems

    , Pages: 176-179
  • Conference paper
    Sohbati M, Liu Y, Georgiou P, Toumazou Cet al., 2012,

    An ISFET design methodology incorporating CMOS passivation

    , Pages: 65-68
  • Conference paper
    Lopes S, Davies N, Toumazou C, Grossman Net al., 2012,

    Theoretical Investigation of Transcranial Alternating Current Stimulation using Laminar Model

    , 34th Annual International Conference of the IEEE Engineering-in-Medicine-and-Biology-Society (EMBS), Publisher: IEEE, Pages: 4152-4155, ISSN: 1557-170X
  • Journal article
    Constandinou TG, Hafliger P, 2012,

    Guest Editorial - Special Issue on Selected Papers From BioCAS 2011

    , IEEE Transactions on Biomedical Circuits and Systems, Vol: 6, Pages: 401-402, ISSN: 1932-4545
  • Conference paper
    Al-Ahdal A, Toumazou C, 2012,

    A Digital CHEMFET Front End

    , 16th IEEE Mediterranean Electrotechnical Conference (MELECON), Publisher: IEEE, Pages: 634-636, ISSN: 2158-8481

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