Passive tunable and polarization-insensitive fan-like metamaterial absorber in the visible spectrum

Ibrahim Issah, Fangfang Li, Marian Baah, Isaac A. Otoo, Lewis Asilevi, Prince Bawuah, and Benjamin O. Asamoah

Journal of the Optical Society of America B 38,pp. C1-C10 (2021)

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​Detection of porosity of pharmaceutical compacts by terahertz radiation transmission and light reflection measurement techniques

P Bawuah, AP Mendia, P Silfsten, P Pääkkönen, T Ervasti, J Ketolainen, ...

International journal of pharmaceutics 465 (1-2), 70-76

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Characterisation of pore structures of pharmaceutical tablets: A review

D Markl, A Strobel, R Schlossnikl, J Bøtker, P Bawuah, C Ridgway, ...

International journal of pharmaceutics 538 (1-2), 188-214

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Characterization of the pore structure of functionalized calcium carbonate tablets by terahertz time-domain spectroscopy and X-ray computed microtomography

D Markl, P Wang, C Ridgway, AP Karttunen, M Chakraborty, P Bawuah, ...

Journal of pharmaceutical sciences 106 (6), 1586-1595

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Non-contact weight measurement of flat-faced pharmaceutical tablets using terahertz transmission pulse delay measurements

P Bawuah, P Silfsten, T Ervasti, J Ketolainen, JA Zeitler, KE Peiponen

International journal of pharmaceutics 476 (1-2), 16-22

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Terahertz study on porosity and mass fraction of active pharmaceutical ingredient of pharmaceutical tablets

P Bawuah, N Tan, SNA Tweneboah, T Ervasti, JA Zeitler, J Ketolainen, ...

European Journal of Pharmaceutics and Biopharmaceutics 105, 122-133

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Estimation of Young’s modulus of pharmaceutical tablet obtained by terahertz time-delay measurement

KE Peiponen, P Bawuah, M Chakraborty, M Juuti, JA Zeitler, J Ketolainen

International journal of pharmaceutics 489 (1-2), 100-105

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Resolving the rapid water absorption of porous functionalised calcium carbonate powder compacts by terahertz pulsed imaging

D Markl, P Wang, C Ridgway, AP Karttunen, P Bawuah, J Ketolainen, ...

Chemical Engineering Research and Design 132, 1082-1090

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Fast and non-destructive pore structure analysis using terahertz time-domain spectroscopy

D Markl, P Bawuah, C Ridgway, S van den Ban, DJ Goodwin, ...

International journal of pharmaceutics 537 (1-2), 102-110

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On the correlation of effective terahertz refractive index and average surface roughness of pharmaceutical tablets

M Chakraborty, P Bawuah, N Tan, T Ervasti, P Pääkkönen, JA Zeitler, ...

Journal of Infrared, Millimeter, and Terahertz Waves 37 (8), 776-785

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On the role of API in determining porosity, pore structure and bulk modulus of the skeletal material in pharmaceutical tablets formed with MCC as sole excipient

C Ridgway, P Bawuah, D Markl, JA Zeitler, J Ketolainen, KE Peiponen, ...

International journal of pharmaceutics 526 (1-2), 321-331

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Noninvasive porosity measurement of biconvex tablets using terahertz pulses

P Bawuah, T Ervasti, N Tan, JA Zeitler, J Ketolainen, KE Peiponen

International journal of pharmaceutics 509 (1-2), 439-443

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A structure parameter for porous pharmaceutical tablets obtained with the aid of Wiener bounds for effective permittivity and terahertz time-delay measurement

P Bawuah, M Chakraborty, T Ervasti, JA Zeitler, J Ketolainen, PAC Gane, ...

International journal of pharmaceutics 506 (1-2), 87-92

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A prototype of an optical sensor for the identification of diesel oil adulterated by kerosene

B Kanyathare, K Kuivalainen, J Räty, P Silfsten, P Bawuah, KE Peiponen

Journal of the European Optical Society-Rapid Publications 14 (1), 1-6

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Gloss measurement in detection of surface quality of pharmaceutical tablets: a case study of screening of genuine and counterfeit antimalaria tablets

P Bawuah, P Pääkkönen, KE Peiponen

Journal of the European Optical Society-Rapid Publications 13 (1), 1-7

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Terahertz-based porosity measurement of pharmaceutical tablets: A tutorial

P Bawuah, D Markl, D Farrell, M Evans, A Portieri, A Anderson, ...

Journal of Infrared, Millimeter, and Terahertz Waves, 1-20

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Highly polarization and wide-angle insensitive metamaterial absorber for terahertz applications

S Daniel, P Bawuah

Optical Materials 84, 447-452

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On the complex refractive index of N-doped TiO2 nanospheres and nanowires in the terahertz spectral region

P Bawuah, P Silfsten, A Sarkar, K Kordas, JP Mikkola, KE Peiponen

Vibrational Spectroscopy 68, 241-245

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A tape method for fast characterization and identification of active pharmaceutical ingredients in the 2-18 thz spectral range

EO Kissi, P Bawuah, P Silfsten, KE Peiponen

Journal of Infrared, Millimeter, and Terahertz Waves 36 (3), 278-290

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Optics-based compressibility parameter for pharmaceutical tablets obtained with the aid of the terahertz refractive index

M Chakraborty, C Ridgway, P Bawuah, D Markl, PAC Gane, J Ketolainen, ...

International journal of pharmaceutics 525 (1), 85-91

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Simultaneous investigation of the liquid transport and swelling performance during tablet disintegration

M Al-Sharabi, D Markl, T Mudley, P Bawuah, AP Karttunen, C Ridgway, ...

International journal of pharmaceutics 584, 119380

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A terahertz time-domain study on the estimation of opto-mechanical properties of pharmaceutical tablets using the Hashin–Shtrikman bounds for refractive index: a case study of …

P Bawuah, KE Peiponen

Optical Review 23 (3), 502-509

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Terahertz absorption spectra of commonly used antimalarial drugs

P Bawuah, JA Zeitler, J Ketolainen, KE Peiponen

Optical Review 25 (3), 444-449

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La promoción de la inclusión a través de la protección social

D Bas Inclusión y cohesión social en el marco de la Agenda 2030 para el Desarrollo …

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Plasmonic implanted Nanogrooves for optical beaming

S Daniel, P Bawuah

Scientific reports 9 (1), 1-8

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Investigating elastic relaxation effects on the optical properties of functionalised calcium carbonate compacts using optics-based Heckel analysis

P Bawuah, AP Karttunen, D Markl, C Ridgway, O Korhonen, P Gane, ...

International journal of pharmaceutics 544 (1), 278-284

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Swastika-shaped microslots as a dual-band metamaterial absorber in the terahertz range

S Daniel, P Bawuah

OSA Continuum 2 (1), 216-224

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Analysis of anisotropic pore structures using terahertz spectroscopy and imaging

D Markl, C Ridgway, P Bawuah, P Gane, J Ketolainen, KE Peiponen, ...

2017 42nd International Conference on Infrared, Millimeter, and Terahertz …

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Terahertz time-domain study on selected parameters of pharmaceutical tablets using effective medium approximations

P Bawuah

Itä-Suomen yliopisto

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Far infrared (THz) absorption spectra for the quantitative differentiation of calcium carbonate crystal structures: Exemplified in mixtures and in paper coatings

P Bawuah, MZ Kiss, P Silfsten, CM Tåg, PAC Gane, KE Peiponen

Optical Review 21 (3), 373-377

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Data supporting'A Fast and Non-destructive Terahertz Dissolution Assay for Immediate Release Tablets'

P Bawuah, D Markl, A Turner, M Evans, A Portieri, D Farrell, R Lucas, ...

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Sensing water absorption in hygrothermally aged epoxies with terahertz time-domain spectroscopy

H Lin, BP Russell, P Bawuah, JA Zeitler

Analytical Chemistry 93 (4), 2449-2455

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A Fast and Non-destructive Terahertz Dissolution Assay for Immediate Release Tablets

P Bawuah, D Markl, A Turner, M Evans, A Portieri, D Farrell, R Lucas, ...

Journal of Pharmaceutical Sciences

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Right-Angle Shaped Elements as Dual-Band Metamaterial Absorber in Terahertz

S Daniel, P Bawuah

Photonic Sensors 10 (3), 233-241

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Data for Simultaneous investigation of the liquid transport and swelling performance during tablet disintegration

M Al-Sharabi, D Markl, T Mudley, P Bawuah, AP Karttunen, C Ridgway, ...

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Supporting data to'Terahertz-Based Porosity Measurement of Pharmaceutical Tablets: a Tutorial'

P Bawuah, D Markl, D Farrell, M Evans, A Portieri, A Anderson, ...

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Exploring the Robustness of Terahertz-Based at-Line Porosity Measurements for Realising a Non-Destructive Dissolution Assay of Tablets during Manufacturing

P Bawuah, D Markl, D Farrell, M Evans, A Portieri, A Anderson, ...

2019 AIChE Annual Meeting

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Difficulties of subsurface liquid front tracking in porous media with terahertz pulsed imaging

M Al-Sharabi, T Mudley, D Markl, P Bawuah, AP Karttunen, CJ Ridgway, ...

2019 44th International Conference on Infrared, Millimeter, and Terahertz …

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Investigating the Influence of a Powder Compact’s Geometry on Its Pore Structure and Optical Properties Using Terahertz Spectroscopy

P Bawuah, R Dong, M Al-Sharabi, D Markl, JA Zeitler

2019 44th International Conference on Infrared, Millimeter, and Terahertz …

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Pyramid-shaped plasmonic slit for optical transmission

S Daniel, P Bawuah

Optical Materials 88, 266-270

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Optical and teraherz (THz) properties of TiO2 nano-wires and particles

P Bawuah

Itä-Suomen yliopisto

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Terahertz pulsed imaging as a new method for investigating the liquid transport kinetics of α-alumina powder compacts

M Al-Sharabi, D Markl, V Vivacqua, P Bawuah, N MacLean, M Bentley, ...

Chemical Engineering Research and Design 165, 386-397

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Fast and Non-Destructive Prediction of Tablet Dissolution by Terahertz Spectroscopy

P Bawuah, D Markl, A Turner, M Evans, A Portieri, D Farrell, R Lucas, ...

RA4. 3 Barbieri, Stefano MD. 25 BarN, Hyeon Sang MD. 18 BarNer, Scott TA3. 5

LRC Barry, F Bartram, JMB Baselmans, YNTD BaucNhage, MTB Bauer, ...

Plasmonic Nanogrooves for Optical Transmission

S Daniel, P Bawuah

Functional surfaces with femtosecond laser ablation

EOSFS Club, P Bawuah, M Baah, S Pélisset, S Mohamed, D Shahwar, ...

Surface-Enhanced Raman Spectroscopy (SERS)

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Glass-transition temperature of the β-relaxation as the major predictive parameter for recrystallization of neat amorphous drugs

EO Kissi, H Grohganz, K Löbmann, MT Ruggiero, JA Zeitler, T Rades

The Journal of Physical Chemistry B 122 (10), 2803-2808

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The significance of the amorphous potential energy landscape for dictating glassy dynamics and driving solid-state crystallisation

MT Ruggiero, M Krynski, EO Kissi, J Sibik, D Markl, NY Tan, D Arslanov, ...

Physical Chemistry Chemical Physics 19 (44), 30039-30047

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The role of glass transition temperatures in coamorphous drug–amino acid formulations

EO Kissi, G Kasten, K Löbmann, T Rades, H Grohganz

Molecular pharmaceutics 15 (9), 4247-4256

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Characterising glass transition temperatures and glass dynamics in mesoporous silica-based amorphous drugs

EO Kissi, MT Ruggiero, NJ Hempel, Z Song, H Grohganz, T Rades, ...

Physical Chemistry Chemical Physics 21 (35), 19686-19694

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A tape method for fast characterization and identification of active pharmaceutical ingredients in the 2-18 thz spectral range

EO Kissi, P Bawuah, P Silfsten, KE Peiponen

Journal of Infrared, Millimeter, and Terahertz Waves 36 (3), 278-290

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Spray-drying of inhalable, multifunctional formulations for the treatment of biofilms formed in cystic fibrosis

N Lababidi, EO Kissi, WAM Elgaher, V Sigal, J Haupenthal, BC Schwarz, ...

Journal of Controlled Release 314, 62-71

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Design of inhalable solid dosage forms of budesonide and theophylline for pulmonary combination therapy

D Leng, EO Kissi, K Löbmann, K Thanki, E Fattal, T Rades, C Foged, ...

Aaps Pharmscitech 20 (3), 1-11

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Single particles as resonators for thermomechanical analysis

PO Okeyo, PE Larsen, EO Kissi, F Ajalloueian, T Rades, J Rantanen, ...

Nature communications 11 (1), 1-11

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Determination of Stable Co-Amorphous Drug–Drug Ratios from the Eutectic Behavior of Crystalline Physical Mixtures

EO Kissi, K Khorami, T Rades

Pharmaceutics 11 (12), 628

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Functionalised calcium carbonate as a coformer to stabilize amorphous drugs by mechanochemical activation

J Liu, T Rades, I Tho, EO Kissi

European Journal of Pharmaceutics and Biopharmaceutics 155, 22-28

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Stabilization of amorphous drugs; are crystalline inorganic excipients a way forward?

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One-step flame synthesis of silver nanoparticles for roll-to-roll production of antibacterial paper

KJ Brobbey, J Haapanen, M Gunell, JM Mäkelä, E Eerola, M Toivakka, ...

Applied Surface Science 420, 558-565

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Antimicrobial characterization of silver nanoparticle-coated surfaces by “touch test” method

M Gunell, J Haapanen, KJ Brobbey, JJ Saarinen, M Toivakka, JM Mäkelä, ...

Nanotechnology, science and applications 10, 137

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Effect of plasma coating on antibacterial activity of silver nanoparticles

KJ Brobbey, J Haapanen, JM Mäkelä, M Gunell, E Eerola, E Rosqvist, ...

Thin Solid Films 672, 75-82

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Controlled time release and leaching of silver nanoparticles using a thin immobilizing layer of aluminum oxide

KJ Brobbey, J Haapanen, M Gunell, M Toivakka, JM Mäkelä, E Eerola, ...

Thin Solid Films 645, 166-172

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Efficacy of natural plant extracts in antimicrobial packaging systems

KJ Brobbey

Journal of Applied Packaging Research 9 (1), 6

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High-speed production of antibacterial fabrics using liquid flame spray

KJ Brobbey, J Haapanen, M Tuominen, J Mäkelä, M Gunell, E Eerola, ...

Textile research journal 90 (5-6), 503-511

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Antibacterial activity of silver and titania nanoparticles on glass surfaces

R Kummala, KJ Brobbey, J Haapanen, JM Mäkelä, M Gunell, E Eerola, ...

Advances in Natural Sciences: Nanoscience and Nanotechnology 10 (1), 015012

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Characterization of flame coated nanoparticle surfaces with antibacterial properties and the heat-induced embedding in thermoplastic-coated paper

KJ Brobbey, J Haapanen, JM Mäkelä, M Gunell, E Eerola, E Rosqvist, ...

SN Applied Sciences 1 (1), 1-14

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Antibacterial surfaces produced by liquid flame spray deposition of silver nanoparticles

KJ Brobbey

Åbo Akademi University

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Towards the Development of Portable and In Situ Optical Devices for Detection of Micro and Nanoplastics in Water: A Review on the Current Status

BO Asamoah, E Uurasjärvi, J Räty, A Koistinen, M Roussey, KE Peiponen

Polymers 13 (5), 730

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Topological charge engineering in lasing bound states in continuum

S Mohamed, J Wang, H Rekola, J Heikkinen, B Asamoah, L Shi, ...

arXiv preprint arXiv:2012.15642

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Identification of Plastic Type and Surface Roughness of Film-Type Plastics in Water Using Kramers–Kronig Analysis

BE Kanyathare, B Asamoah, MU Ishaq, J Amoani, J Räty, KE Peiponen

Chemosensors 8 (4), 88

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Detecting Microplastics with Optics

KE Peiponen, BO Asamoah, B Kanyathare, J Räty, M Roussey

https://www.osa-opn.org/home/articles/volume_31/november_2020/features …

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Tunable photoluminescence of silver molecular clusters formed in Na+-Ag+ ion-exchanged antimony-doped photo-thermo-refractive glass matrix

Y Sgibnev, B Asamoah, N Nikonorov, S Honkanen

Journal of Luminescence 226, 117411

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On optical sensing of surface roughness of flat and curved microplastics in water

BO Asamoah, M Roussey, KE Peiponen

Chemosphere 254, 126789

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Optically induced crossover from weak to strong coupling regime between surface plasmon polaritons and photochromic molecules

BO Asamoah, S Mohamed, S Datta, P Karvinen, H Rekola, A Priimagi, ...

Optics Express 28 (18), 26509-26518

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Optical screening for presence of banned Sudan III and Sudan IV dyes in edible palm oils

SS Andoh, K Nyave, B Asamoah, B Kanyathare, T Nuutinen, C Mingle, ...

Food Additives & Contaminants: Part A 37 (7), 1049-1060

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Optical transmission spectra study in visible and near-infrared spectral range for identification of rough transparent plastics in aquatic environments

B Kanyathare, BO Asamoah, U Ishaq, J Amoani, J Räty, KE Peiponen

Chemosphere 248, 126071

Laser beam scattering for the detection of flat, curved, smooth, and rough microplastics in water

BO Asamoah, J Amoani, M Roussey, KE Peiponen

Optical Review 27 (2), 217-224

Double resonant plasmonic lattices for Raman studies

K Alam, KM Kabusure, BO Asamoah, T Nuutinen, M Baah, S Mohamed, ...

Nanoscale 12 (45), 23166-23172

A prototype of a portable optical sensor for the detection of transparent and translucent microplastics in freshwater

BO Asamoah, B Kanyathare, M Roussey, KE Peiponen

Chemosphere 231, 161-167

Imaginary optical constants in near-infrared (NIR) spectral range for the separation and discrimination of adulterated diesel oil binary mixtures

B Kanyathare, B Asamoah, KE Peiponen

Optical Review 26 (1), 85-94

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Scanning of skin gloss by a diffractive optical element-based handheld glossmeter

BO Asamoah, KE Peiponen

Optical Review 25 (6), 694-700

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Table model and portable optical sensors for the monitoring of time-dependent liquid spreading over rough surfaces

BO Asamoah, B Kanyathare, KE Peiponen

Journal of the European Optical Society-Rapid Publications 14 (1), 1-8

ASIAN JOURNAL OF PHYSICS

KE Peiponen, B Kanyathare, B Asamoah

Asian Journal of Physics Vol 27 (9-12), 447-456

Energy Transfer from Silver Clusters to Eu3+ Ions in Silicate Glass for Down-conversion

BO Asamoah

Itä-Suomen yliopisto

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Pharmacoinformatics-based identification of potential bioactive compounds against Ebola virus protein VP24

SK Kwofie, E Broni, J Teye, E Quansah, I Issah, MD Wilson, WA Miller III, ...

Computers in biology and medicine 113, 103414

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Investigating the Conformation of S100β Protein Under Physiological Parameters Using Computational Modeling: A Clue for Rational Drug Design

EK Tiburu, MD Ibrahim Issah, RE Armah-Sekum, SOA Gyampo, ...

The open biomedical engineering journal 12, 36

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Electrochemical Response of Saccharomyces cerevisiae Corresponds to Cell Viability upon Exposure to Dioclea reflexa Seed Extracts and Antifungal Drugs

PK Arthur, AB Yeboah, I Issah, S Balapangu, SK Kwofie, BO Asimeng, ...

Biosensors 9 (1), 45