2026 CAP Congress / Congrès de l'ACP 2026

Session

(DSS) Surface Science R1-8 | Science des surfaces (DSS)

R1-8

25 Jun 2026, 14:15

U. Ottawa - Learning Crossroads (CRX) Building

777. Enabling Atomically Precise Fabrication Through Inverted Mode STM

Mr Bheeshmon Thanabalasingam (CBN Nano Technologies Inc.)

25/06/2026, 14:15

Surface Science / Science des surfaces (DSS)

Oral (Non-Student) / Orale (non-étudiant(e))

In this talk, based on recently published work [1], we introduce a novel scanning tunneling microscopy (STM) method called inverted-mode STM (IM-STM), an approach that offers a fundamentally new way to do STM and enables atomically precise fabrication via mechanosynthesis. Performing reproducible manipulation of covalently bonded atoms requires control over the atomic configuration of both...

571. Atomically Precise Silicon Abstraction by Inverted-Mode STM

Dr Rosemary Cranston (CBN Nano Technologies Inc.)

25/06/2026, 14:30

Surface Science / Science des surfaces (DSS)

Oral (Non-Student) / Orale (non-étudiant(e))

Direct 3D manipulation of covalently bonded atoms remains a challenge for atomically precise fabrication. Here, we introduce inverted-mode scanning tunnelling microscopy (IM-STM) [1] as a new approach for controlled atomic-scale reactions and demonstrate its application to individual silicon atom abstraction under ultra-high vacuum and cryogenic conditions. A silicon probe chip (SPC) with an...

764. The effect of surface Plasma treatment on the oxidation states of Ge and SiGe

Dr Shahin Honari (National Research Council Canada), Mr Yousef Karimi Yonjali (National Research Council Canada)

25/06/2026, 14:45

Surface Science / Science des surfaces (DSS)

Oral (Non-Student) / Orale (non-étudiant(e))

In this work we study the oxidation surface states at SiGe/Al2O3 and Ge/Al2O3 interface using X-ray photoelectron spectroscopy. The effect of different pre-deposition chemical cleaning techniques as well as an in-situ H2 plasma treatment was investigated on the oxidation states of Ge and Si at the interface. One would expect that H2 plasma cleaning could significantly suppress the SiO and GeO...

590. Modifications of flexible organic semiconducting polymer thin films upon folding

Xin Wei

25/06/2026, 15:00

Surface Science / Science des surfaces (DSS)

Oral not-in-competition (Graduate Student) / Orale non-compétitive (Étudiant(e) du 2e ou 3e cycle)

Not only are thin films of organic semiconducting polymers on flexible plastic substrates (such as polyethylene terephthalate, PET) suitable to several applications in organic electronics, but they also present intriguing mechanical properties due to their variable degree of crystallinity, thickness, and stacking of polymer chains. These properties are controlled by the degree of tacticity of...

560. Interface Engineering in P3HT:PCBM OPVs via TRT-Transferred Graphene Oxide and Tunable LiF Nanoparticle Deposition

Indra Guzman Moreno (Concordia University)

25/06/2026, 15:15

Surface Science / Science des surfaces (DSS)

Oral not-in-competition (Graduate Student) / Orale non-compétitive (Étudiant(e) du 2e ou 3e cycle)

Graphene oxide (GO) is a promising electron transport layer for organic photovoltaics (OPVs) due to its tunable surface chemistry and interfacial properties. In parallel, LiF nanoparticle interlayers are widely used to improve cathode contact behavior, as they provide morphological properties which contribute to energy level alignment in these devices. Here, we present a study which tests the...

781. Additive Mechanosynthesis of C2H Moieties on Si(100):H Using Inverted-Mode STM

Sam Rohe (CBN Nano Technologies Inc.)

25/06/2026, 15:30

Surface Science / Science des surfaces (DSS)

Oral (Non-Student) / Orale (non-étudiant(e))

Atomically Precise Fabrication (APF) is the creation of covalently-bonded structures through addition, subtraction, or manipulation of atoms or small molecules. Our approach to APF is Inverted-Mode Scanning Tunneling Microscopy (IM-STM), a mechanosynthesis-based technique that uses tailored 3D molecules deposited on a sample to scan and react with a flat, crystalline probe, enabling reagent...

768. Inverted-Mode Scanning Tunneling Microscopy as a Route Towards Atomically Precise Solid-State Quantum Technologies

Hadiya Ma (CBN Nano Technologies Inc)

25/06/2026, 15:45

Surface Science / Science des surfaces (DSS)

Oral (Non-Student) / Orale (non-étudiant(e))

Solid-state qubit systems such as T centres and donor spin qubits in silicon are atomic architectures of increasing interest as promising routes toward scalable quantum technologies. These systems can exploit nuclear and electronic degrees of freedom, are optically addressable, can operate at room temperature [1,2] , and naturally exhibit sought-after quantum behaviour such as long spin...