PHYSICS Final Oral Presentation by PHYS 4501 FDE student (Zoom event) - S. White

Event Date: 
Thursday, April 29, 2021 - 1:00pm EDT
Event Location: 
Zoom Event
Event Contact Name: 
Dr. Apichart Linhananta
Event Contact E-mail: 

The Department of Physics invites you to virtually attend a
Final Oral Presentation by PHYS 4501 FDE student:

SACHA WHITE
"Factors Influencing Particle Removal Efficiency of Mask Filter Media"

 THURSDAY, APRIL 29th, 2021
Time: 1:00 PM

(for Zoom link and password email alinhana@lakeheadu.ca)

Department of Physics Seminar presented by Dr. Kyle R. Murphy

Event Date: 
Tuesday, April 27, 2021 - 9:30am EDT
Event Location: 
Zoom Event
Event Contact Name: 
Dr. Mark Gallagher
Event Contact E-mail: 
 Physics logo
 

The Department of Physics invites you to attend a Zoom seminar
presented by:
 

DR. KYLE R. MURPHY
Independent Contractor
Data Analyst/Researcher, Thunder Bay

 entitled:

 

Ultra-Low Frequency (ULF) waves are a classification of geomagnetic pulsation observed by both in-situ spacecraft and ground-based instrumentation. These waves are manifested in the Earth’s ionosphere and magnetosphere as perturbations of the local plasma, and electric and magnetic fields with periods of ~0.1-1000s (frequencies ~1-10000 mHz). ULF waves are recognized as playing an important role in the overall dynamics of both the ionosphere and the magnetosphere, from the modulation of electron precipitation into the ionosphere, to the acceleration, transport, and loss of energetic particles within the inner-magnetosphere. These dynamics are referred to as Space Weather and can have catastrophic affects on ground-based and satellite infrastructure.

In this talk I will investigate the role of ULF waves in the dynamics of energetic particles in the Earths inner-magnetosphere and in particular, the ring current and outer radiation belt. Using a database of ULF wave power, calculated from ground-based magnetometer observations of ULF waves over multiple solar cycles, I will demonstrate a clear relation between ULF waves and the strength of the Earth’s ring current. Utilizing the same observations, I will further demonstrate that ULF wave acceleration and transport of energetic electrons is a key process in radiation belt dynamics during geomagnetic storms (periods of extreme geomagnetic activity driven by Coronal Mass Ejections and Co-rotating Interaction Regions) as characterized by in-situ spacecraft. Overall, this works demonstrates the importance of ULF waves in Space Weather dynamics and the utility of ground-based observations in the study of the Earth’s magnetosphere and Space Weather. 

Bio:  Dr. Murphy obtained his PhD in 2013 from the University of Alberta studying the dynamics of magnetospheric substorms and the aurora. In 2014 he started as an NSERC Postdoctoral Fellow at the NASA Goddard Space Flight Center (GSFC) and continued to study the aurora while expanding to study the dynamics of the outer radiation belt. Following the completion of the NSERC fellowship Dr. Murphy transitioned to a research position at the Universities Space Research Association (USRA) focusing on radiation belt research. In 2017 Dr. Murphy started at the University of Maryland as research faculty focusing on space weather.

TUESDAY, APRIL 27th, 2021
9:30 AM Zoom Event

(for Zoom link and password email mcgallag@lakeheadu.ca)

 

 

 

PHYSICS Final Oral Presentations by PHYS 4501 FDE students (Zoom event) - N. Kakekaspan, Y. Malhi, N. Oriecuia and A. Shahi

Event Date: 
Thursday, April 8, 2021 - 4:30pm EDT
Event Location: 
Zoom Event
Event Contact Name: 
Dr. Apichart Linhananta
Event Contact E-mail: 

The Department of Physics invites you to virtually attend 
Final Oral Presentations by PHYS 4501 FDE students

 Noah Kakekaspan
Decomposing Multiple Copies of sp(2,R) into Symmetrized Irreducible Representations

Yamandeep Malhi
Optimization of image reconstruction parameters for Positron Emission Tomography (PET) images
using Maximum Likelihood Expectation Maximization.

Nathaniel Oriecuia
Development of Attenuation Correction for Positron Emission Tomography (PET)
Clinical Images

Anirudh Shahi
Signal Pulse Analysis in Positron Emission Tomography for Improvement in Coordinate
Reconstruction

 THURSDAY, APRIL 8th, 2021
4:30 pm – 6:30 pm Zoom

(for Zoom link and password email alinhana@lakeheadu.ca)

Department of Physics Seminar presented by Dr. Mitchell Albert

Event Date: 
Friday, March 5, 2021 - 1:30pm EST
Event Location: 
Zoom Event
Event Contact Name: 
Dr. Mark Gallagher
Event Contact E-mail: 
Physics logo

The Department of Physics invites you to attend a Zoom seminar presented by:
 
DR. MITCHELL ALBERT
Research Chair, Thunder Bay Regional Health Research Institute &
Professor of Chemistry, Lakehead University
 
entitled:
 
 
Abstract:
Hyperpolarized (HP) xenon-129 (129Xe) was co-invented by Dr. Mitchell Albert in the early 1990’s. Over the last 30 years, the field of HP 129Xe magnetic resonance imaging (MRI) has been under intensive development. This presentation highlights the history of HP 129Xe MRI development with a focus on the recent applications of HP 129Xe MRI for functional brain and lung imaging. The main applications of HP 129Xe brain imaging will be discussed, such as stroke imaging, Alzheimer’s disease detection, hemodynamic response detection, and functional brain imaging. The main applications of HP 129Xe lung disease imaging will also be discussed, such as asthma, chronic obstructive pulmonary disease (COPD), idiopathic pulmonary fibrosis (IPF), and cystic fibrosis (CF).
 
Friday, March 5th, 2021
1:30 pm Zoom Event
 
To Participate email the contact as listed below for the Zoom link, login & password
 
Contact: Dr. Mark Gallagher
mcgallag@lakeheadu.ca

Department of Physics Seminar presented by Dr. Maryam Ebrahimi

Event Date: 
Friday, February 5, 2021 - 3:00pm EST
Event Location: 
Zoom Event
Event Contact Name: 
Dr. Mark Gallagher
Event Contact E-mail: 

logo

The Department of Physics invites you to attend a Zoom seminar presented by:

DR. MARYAM EBRAHIMI
Assistant Professor & Tier 2 Canada Research Chair in Low-Dimensional Nanomaterials
Department of Chemistry

entitled:

"Surface-confined synthesis of molecular-based low-dimensional nanomaterials"

Friday, February 5th, 2021
3:00 p.m. Zoom Event

 Join Zoom Meeting
(To Participate email the contact as listed below for the Zoom Link, Login & Password)

 Contact: Dr. Mark Gallagher
 
 

Abstract:
The growing interest in low-dimensional nanomaterials stems from their remarkable properties, such as high electrical conductivity, heat transfer, mechanical and chemical stability, arising from dimension reduction. These exceptional properties have made graphene, the only 2D material in nature, the focus of significant academic research over the past two decades. However, the lack of an electronic bandgap limits its use in some electronic applications. This limitation has inspired the emergence of novel nanomaterials, such as self-assembled molecular networks, 2D polymers and covalent organic frameworks, towards constituting several prominent classes of organic analogues of graphene. [1] The chemical and electronic properties of these low-dimensional nanomaterials are determined by their morphology, dimension, size, building blocks, π-electron delocalization, and the chemical nature of the bonds held them together.

My research focuses on the on-surface synthesis of nanomaterials whose chemical and electronic properties can be tailored by their chemical structure. Surfaces are used as a platform to design and fabricate ‘bottom-up’ materials made of organic molecules. [2] The molecules’ functional groups and the reactivity of the substrates control the molecule-molecule and molecule-substrate interactions. These factors, together with the surface planes, temperature, deposition rate, and coverage, steer surface chemical reactions; hence, control the design of the obtained molecular structures. I have adapted various surface reactions for the synthesis of molecular imprints, 1D and 2D polymers, metal-organic networks, and organometallic structures. [3-10] To identify their morphology and chemical nature, we employ scanning tunnelling microscopy and non-contact atomic force microscopy with atomic scale resolution, and other surface characterization techniques, such as X-ray photoelectron spectroscopy, complemented with density functional theory calculations.

The chemical, thermal, and mechanical stability, and structural design of these molecular-based low-dimensional nanomaterials make them promising candidates for various applications, from the adsorption of greenhouse gases for environmental applications, to harvesting energy and light. Their unique tunable electronic properties, ranging from semiconducting to insulating behaviour, give rise to their integration in organic electronic devices used in displays, smartphones, and sensors. In summary, the molecular level understanding of the surface phenomena offers the pathway for the rational design of molecular networks and low-dimensional nanoarchitectures with tunable properties.

References
[1] M. Ebrahimi, F. Rosei, Nature 542 (2017) 423-424 (News & Views)
[2] D. P. Goronzy et al., ACS Nano 12 (2018) 7445-7481
[3] M. Ebrahimi et al., Journal of the American Chemical Society 133 (2011) 16560-16565
[4] G. Galeotti et al., Faraday Discussions 204 (2017) 453-469
[5] D. Cui et al., Journal of the American Chemical Society 139 (2017) 16732-16740
[6] F. De Marchi et al., Nanoscale 10 (2018) 16721-16729
[7] G. Galeotti et al., Chemical Science 10 (2019) 5167-5175
[8] C. Jing et al., Angewandte Chemie International Edition 58 (2019) 18948-18956
[9] G. Galeotti et al., Nature Materials 19 (2020) 874-880
[10] P. Ji et al., Small 16 (2020) 2002393

PHYSICS Mid-term Presentations by PHYS 4501 students (Zoom event) - N. Kakekaspan, Y. Malhi, N. Oriecuia, A. Shahi and S. White

Event Date: 
Friday, January 29, 2021 - 1:30pm EST
Event Location: 
Zoom
Event Contact Name: 
Dr. Apichart Linhananta
Event Contact E-mail: 

The Department of Physics invites you to virtually attend 
Mid-term Presentations by PHYS 4501 FDE students

 Noah Kakekaspan
Decomposing Multiple Copies of sp(2,R) into Symmetrized Irreducible Representations

Yamandeep Malhi
Optimization of image reconstruction parameters for Positron Emission Tomography (PET) images
using 
Maximum Likelihood Expectation Maximization.

Nathaniel Oriecuia
Development of Attenuation Correction for Positron Emission Tomography (PET)
Clinical Images

Anirudh Shahi
Signal Pulse Analysis in Positron Emission Tomography for Improvement in Coordinate
Reconstruction

 Sacha White
Factors Influencing Particle Removal Efficiency of Mask Filter Media


on
 FRIDAY, JANUARY 29th, 2021
from 1:30 – 300 pm by Zoom

(for Zoom link, login and password email contacts as listed)

 

Physics MSc Thesis Defense (Zoom Event) presented by Davide Marchese

Event Date: 
Tuesday, October 13, 2020 - 1:00pm EDT
Event Location: 
Zoom Event
Event Contact Name: 
Dr. Mark Gallagher
Event Contact E-mail: 

The Department of Physics invites you to attend a Master of Science Thesis Defense
Presented by:

DAVIDE MARCHESE
Master of Science in Physics Candidate

 "Study of a Brominated Triphenylamine Derivative on Metal and Semiconducting Surfaces"

Supervisor: Dr. M. Gallagher
Committee Members: Drs. G. Das & H. de Guise

Date and Time:

TUESDAY, OCTOBER 13, 2020 from 1:00-2:00 pm

 Join Zoom Meeting
(To Participate email the contact as listed below for the Zoom Link, Login & Password)

 
Contact:
Dr. Mark Gallagher
mcgallag@lakeheadu.ca
 

 

Physics MSc Thesis Defense (Zoom Event) presented by Navneet Kaur

Event Date: 
Friday, September 4, 2020 - 1:00pm EDT
Event Location: 
Zoom Event
Event Contact Name: 
Dr. Gautam Das
Event Contact E-mail: 

Department of Physics invites you to attend a Master of Science Thesis Defense
(Zoom event) Presented by:

 NAVNEET KAUR
Master of Science in Physics Candidate

 "Tweezing and Manipulating Nanomaterials on Tapered Optical Fiber to Develop Surface-Enhanced Raman Spectroscopy (SERS) Substrate"

 Supervisor: Dr. G. Das
Committee Members: Drs M. Gallagher & A. Linhananta

Abstract:

A compact and cost-effective fiber-based probe was manufactured for the detection of chemicals at low concentrations using Surface-Enhanced Raman Spectroscopy (SERS). Multi-mode optical fiber was tapered with a dynamic etching process using Hydrofluoric (HF) acid. The desired length, tip diameter, and cone angle of the tapered fiber were obtained by using this process. The SERS substrate was prepared by depositing Gold Nanorods (GNRs) on the tapered fiber surface by the phenomenon called Optical Tweezing (OT). The tapered fiber was characterized by using a Scanning Electron Microscope (SEM) and Optical Microscope. Light from a He-Ne laser was coupled to the untapered end of the tapered fiber to study the distribution of GNRs using the Optical Microscope. The effect of different tweezing wavelengths, and the tapered length on the distribution of GNRs on the tapered fiber surface was investigated. It was observed that the maximum surface area of tapered fiber was covered with GNRs when tweezed consecutively with two different wavelengths (1064 nm and 632 nm). The application of the tapered fiber covered with GNRs as a SERS substrate was investigated for two chemicals, Rhodamine 6G (R6G) and Graphite. Furthermore, we presented the tweezing of a compound containing metal ion (Zn2+) on the tapered fiber surface when mixed with GNRs solution using two lasers consecutively.

 

Date and Time:

FRIDAY, SEPTEMBER 4th, 2020 at 1:00 pm

 

 Zoom link:

Time: Sep 4, 2020 01:00 PM Eastern Time (US and Canada)


Join Zoom Meeting
(To Participate email the contact as listed below for the Zoom Link, Login & Password)

 
Contact:
Dr. Gautam Das
or
 
 

 

 

Physics MSc Thesis Defense (Zoom Event) - presented by D. Michael Frood

Event Date: 
Monday, May 4, 2020 - 3:00pm EDT
Event Location: 
Zoom Event
Event Contact Name: 
Dr. Apichart Linhananta
Event Contact E-mail: 

Department of Physics invites you to attend a Master of Science Thesis Defense
(Zoom event) Presented by:

D. Michael Frood

"Simulated Accelerated Evolution by Modeling the Rapid Fixation of Bacteria
Along an Antibiotic Gradient"

 
Supervisor: Dr. A. Linhananta
Committee members: Dr. M. Gallagher, Dr. G. Das
External Examiner: Dr. James Polson (Physics, University of Prince Edward Island)
 
 
Zoom Event:
Monday, May 4, 2020 at 3:00 pm
 (official start time of the defense will be 3:15 pm)
(for Join Zoom Link, Login & Password email contact as listed)
 
Contact:
Apichart Linhananta
 
 
 
 
 

PHYSICS Honours Thesis Presentations by PHYS 4501 students - A. Boon, H. Harris, P. Zebarth - Zoom Event

Event Date: 
Tuesday, April 7, 2020 - 1:30pm EDT
Event Location: 
Zoom Meeting
Event Contact Name: 
Dr. Mark Gallagher/Dr. H. de Guise/Dr. A. Linhananta
 
The Department of Physics
Zoom Event for Honours Thesis Presentations (Phys 4501 YA)
presented by:
 
ARI BOON
"Patterns of many-photon Hong-Ou-Mandel dips”

HUNTER HARRIS
"Biophysics Model of the Evolution of Bacteria Resistance to Antibiotics”

PAUL ZEBARTH
"Investigation of Organic Molecules on Gold Surfaces"

Zoom Event:
Tuesday, April 7th
at 1:30 pm
(for Zoom link, login and password email contacts as listed)
 

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