Bath Mechanical Engineering PhD Studentship: Dexterous Microrobotic End-Effectors for Minimally Invasive Endoscopic Interventions

Bath Mechanical Engineering PhD Studentship: Dexterous Microrobotic End-Effectors for Minimally Invasive Endoscopic Interventions

Project and policy information below reflects the October 2026 application material. Confirm current availability before submission. Paper evidence has the unequal abstract/selected-manuscript scope described below.

Quick Decision

Strong but verify fit. This Bath Mechanical Engineering project asks how several tiny optothermal fingers can move independently at an endoscope tip, rather than merely open and close. It combines microfabrication, optical addressing and feedback control. Belal Ahmad's published microgrippers provide a relevant starting point, but the proposed sub-millimetre device and phantom demonstrations remain doctoral objectives. The October 2026 URSA terms explicitly include Overseas tuition and maintenance; individual award duration and 2027 stipend remain unconfirmed. The useful first contact is Ahmad: ask which manipulation task, fabrication capability and measurement system would define the first year.

Research Problem and Doctoral Work

Miniaturisation reduces the space available for joints, wiring and sensing. A gripper that moves successfully in isolation can become difficult to control when several actuators share an optical delivery system. This project proposes multi-finger, multi-degree-of-freedom end-effectors, aiming for a footprint below 1 mm. Tasks include coordinated grasping, retraction and fine in-hand positioning. Independent three-dimensional actuation, open- and closed-loop control and eventual real-time operation are proposed work, not established characteristics of an existing complete surgical instrument.

The advertised approach combines optothermal microjoints with spatial light modulation, including digital micromirror devices, and fabrication compatible with small robotic structures. A plausible thesis contribution would establish how optical addressing, thermal response and mechanical coupling jointly determine positioning accuracy. That interpretation follows the project and papers; the final device geometry, sensing approach and initial task have not been specified. A useful evaluation would distinguish an actuator's displacement from an end-effector's dexterity, and successful object handling from robust performance under changing illumination or loading. This is a research framing, not a promised experimental protocol.

Ahmad's 2022 study reports optothermally actuated spiral bimaterial joints, tested in air and water, with selective joint motion and microbead manipulation. Reported repeated operation exceeding 100 cycles supports laboratory repeatability, not clinical service life. The 2023 hybrid microgripper separates magnetic positioning from optothermal gripping in liquid. Its reported 1.5 mm length also shows why that device does not already establish this project's sub-millimetre goal. Evidence for both papers is limited to complete original abstracts and metadata; full methods and supplementary data remain outside that scope. 2022 microjoints, 2023 hybrid microgripper.

The 2025 Chen–Thompson–Ahmad paper is more directly informative about integration. The available selected experimental, results, discussion and conclusion passages of its accepted manuscript describe a three-DoF gripper and microbead manipulation. Manual calibration and light crosstalk between fibres can cause unintended actuation; these constrain independent control. Its endoscopic use is future potential. Neither these experiments nor the planned human-phantom tests establish patient benefit, tissue safety, sterilisation compatibility or clinical approval. MHRA guidance likewise distinguishes non-human bench or preclinical work from human clinical investigation. Those later translation requirements should inform scope discussions without turning this PhD into an assumed clinical trial. 2025 multi-DoF study, MHRA investigation guidance.

School, Programme and Field Context

The registration route is the University of Bath Mechanical Engineering PhD, catalogue code REME-AFM02. The programme describes a normally four-year full-time doctorate, with a two-year minimum, progression requirements and thesis examination. The university awards the degree. Ahmad's Imperial honorary position and earlier international appointments do not establish joint registration, a joint degree or a placement entitlement. The recruitment links to a Mechanical Engineering application route; that route identifier should not be substituted for the programme catalogue code. Mechanical Engineering PhD.

Bath's REF 2021 result reports 96% of its submitted combined Engineering research as world-leading or internationally excellent. That unit covers several engineering disciplines and is not a ranking of Ahmad's group or microrobotics specifically. QS lists Bath at 125 overall for 2027, versus 132 in 2026; again, this is institutional context rather than evidence that a particular apparatus is available. Bath REF results, QS institutional ranking.

The relevant local environment is the Centre for Bioengineering and Biomedical Technologies, which lists Ahmad and connects engineering with biomedical research. Bath also provides doctoral professional development. Project-specific courses, clinical collaborators, instrument allocations and technical support are not named commitments. For training value, the important question is whether the student can learn fabrication, optics and control with sufficient hands-on support, rather than expecting the centre's wider portfolio to guarantee every resource. CBio, Doctoral development.

Supervisor and Lab Assessment

Belal Ahmad is listed as a Lecturer in Mechanical Engineering, a CBio member and an advertised doctoral supervisor; the official contact is ba2009@bath.ac.uk, ORCID 0000-0003-0170-7860. His profile describes dexterous microrobotics, actuation, control and sensing, including optical and magnetic approaches. An Imperial Honorary Research Fellowship beginning in August 2026 follows his Imperial research fellowship; Bath is the present project host. Only Ahmad is named in this recruitment. Paper coauthors Thompson, Barbot, Ulliac and Bolopion should not be presented as confirmed co-supervisors. Ahmad's current profile.

The three original papers trace a progression from compact joint actuation in IEEE/ASME Transactions on Mechatronics (2022), through hybrid positioning in liquid in IEEE Robotics and Automation Letters (2023), to multi-actuator integration in the latter journal (2025). The first two are supported only at abstract level, leaving full stress tests, material compatibility and raw-data robustness unassessed. Microbeads provide a limited surrogate for intervention tasks. Microjoint contribution, Hybrid manipulation contribution.

The 2025 selected accepted-manuscript passages provide more detailed evidence on multi-actuator coordination, including measured manipulation, manual calibration and crosstalk. They motivate a question for Ahmad: how will the new project improve addressing and feedback under coupled actuation? They establish neither autonomous surgery nor reliable in-vivo operation. All three studies include Ahmad, with unequal evidence depth; none should be presented as a fully assessed clinical device. Multi-DoF contribution and limitations.

The recruitment names NanoOne Bio two-photon fabrication, metal-deposition cleanroom capabilities and custom multicore-fibre expertise. Those are useful signs of technical fit. Access priority, consumable funding, specialist supervision and equipment readiness for this student's design still need confirmation. Meeting frequency, group size and daily guidance are unpublished. Robotics careers could draw on precision actuation, optical instrumentation, measurement and control skills; a surgical-device career would additionally require clinical and regulatory experience not guaranteed here. The opportunity is therefore strongest as an engineering research doctorate, with translation potential rather than an assured clinical product.

Funding, Application, and Living Costs

The recruitment is explicitly linked to URSA. The October 2026 URSA terms describe the 2027 Engineering and Design competition, with a 29 November 2026, 23:59 GMT deadline; the project text itself supplies 29 November without a clock. Expected entry is 4 October 2027, with an alternative date requiring agreement. The October 2026 terms provide a competitive route for Home and Overseas tuition and maintenance, including for eligible Chinese applicants. Selection is competitive, and the Overseas cap has no published percentage. URSA competition.

The Engineering award's general maximum is 3.5 years, whereas the academic doctorate normally lasts four. Personal funded months, continuation, writing-up support and the 2027 maintenance rate are not specified. £21,805 is the 2026/27 reference, not a confirmed 2027 award. Up to £1,000 yearly training support is not spendable living income. Confirm how the award treats fee increases and any remaining study period. The university's 2027/28 Overseas Engineering research tuition is £31,350 annually before any award, with annual-increase provisions. Award coverage, Research tuition.

Bath's dated 2025/26 postgraduate sample budget totals £405 weekly, or £21,060 over 52 weeks. Its university-managed accommodation reference is £230 weekly with a 51-week contract. Comparing £21,805 with £21,060 leaves only £745, but this mixes reference years and is merely a sensitivity check, not a 2027 disposable-income estimate. Housing choice and summer coverage matter. The sample excludes tuition, flights and immigration charges. Official postgraduate budget.

The October 2026 Student visa application fee is £558, and the student IHS rate is £776 per visa year, with duration and part-year rules affecting the total. URSA says visa and IHS costs are the student's responsibility; no reimbursement is established for this project. Upfront relocation money may therefore be needed even with tuition coverage. These costs should be checked again at visa application rather than treated as a fixed total for four years. Student visa, Health surcharge.

Applicant Fit and Preparation

The project requires a first or 2:1 Honours degree, or international equivalent, including applicants about to obtain it. A Master's degree is advantageous. Relevant backgrounds include mechanical, electrical or biomedical engineering, robotics and related subjects. Some programming experience is expected. Control, microfabrication, optics and microrobotics experience is highly advantageous, rather than four simultaneous entry requirements. An applicant should show a specific contribution to an experimental or quantitative project, including measurement limitations and what they personally implemented.

Bath encourages applications from under-represented groups. Applicants may add a short paragraph at the end of the personal statement if circumstances affected their educational attainment. If an applicant declares a disability, the Disability Service will contact them to discuss support needs.

For a Chinese applicant, the course's international-equivalence route and URSA's explicit Overseas coverage give a positive route in principle. The country information does not establish a universal Chinese PhD percentage or university list. Its taught-postgraduate percentage range must not be reused as a doctoral cutoff. The course's general alternative qualifications and project-specific degree wording should be checked against the actual transcript. A Master's degree should not be assumed to waive every undergraduate or subject condition. Programme entry requirements, International qualification guidance.

Mechanical Engineering requires IELTS 6.5 with every component at least 6. TOEFL iBT, including Home Edition, uses 90 with every component 21 for tests before 21 January 2026, and 4.5 with every component 4 on the newer scale for tests taken on or after 21 January 2026. Tests normally need to fall within 24 months before entry. A qualifying recent English-taught degree may permit an individually confirmed exemption; a Chinese medium-of-instruction letter is not automatic clearance. Crucially, non-UK applicants not currently studying in the UK must meet English requirements by the funding application deadline, with no exceptions. Generic conditional-offer or pre-sessional options do not override this project condition. Course language scores, Doctoral English policy.

The application permits at most two projects and requires the URSA option with the relevant project and supervisor fields. The advertised title is “Bath Engineering & Design Studentships: Dexterous microrobotic end-effectors for minimally invasive endoscopic interventions”. Prepare an up-to-date CV, degree records, transcripts, applicable English evidence and a personal statement. Two referees are required, including an academic referee from the most recent institution attended; intended supervisors cannot serve as referees. The saved material does not specify which documents trigger a requirement for authorised English translations; confirm this with admissions. The own-idea research-proposal rule, normally 1,000 words, should not automatically become an extra requirement for this advertised project. Additional project-specific documents should be confirmed. Bath prohibits AI-generated application text; this report supports research and understanding, not a statement to submit. Mechanical Engineering is ATAS-covered, and China is not on the nationality exemption list. The offer's subject code and individual process govern clearance; this is not a categorical nationality ban. Doctoral application guide, ATAS rules.

Next Actions and Questions to Verify

Before applying, contact Ahmad about the first manipulation task, the meaning of the sub-millimetre footprint and which fabrication or optical work the student will actually own. Confirm the Mechanical Engineering route and project fields, degree equivalence if uncertain and English evidence before the funding deadline. Ask admissions which cutoff time applies: the project description gives 29 November without a time, while the October 2026 URSA terms state 23:59 GMT. The October 2026 recruitment text describes the project but does not establish that it remains available today. Before applying, ask Ahmad or admissions which project description is current and whether an updated project-specific attachment applies. The cited course and URSA pages support their own policies, not individual equipment, supervision or testing commitments.

At interview, ask how unintended optothermal actuation will be measured and separated from mechanical coupling, what feedback is realistically available and what counts as successful phantom validation. Ask who teaches fabrication and optics, which instrument access is committed, and whether a clinical collaborator is involved. A thesis can make a strong control or actuator contribution without demonstrating patient outcomes. The agreed scope should make that distinction explicit.

Before accepting, obtain written funded months, the 2027 stipend, fee coverage, any research charges and the plan for study beyond the general 3.5-year award cap. Also establish supervision frequency, additional supervisor roles, intellectual-property arrangements and any overseas visit expectations. Discuss ATAS, CAS and relocation timing with admissions. These unresolved items affect feasibility and training value; they do not negate the current competitive international funding route.

Evidence and Sources

Project, Supervisor and Original Research

• University of Bath PhD project advertisement
• Belal Ahmad Bath profile
• Ahmad et al. 2022 spiral optothermal microjoint original
• Ahmad et al. 2023 hybrid optothermal-magnetic microgripper original
• Chen Thompson Ahmad 2025 multi-DoF optothermal microgripper original
• Bath Centre for Bioengineering and Biomedical Technologies

School and Doctoral Training

• Mechanical Engineering PhD official programme
• Bath REF 2021 submitted engineering results
• Bath doctoral professional development
• QS Bath overall 2027 table

Funding, Application and Translation Context

• MHRA current bench versus human clinical investigation guidance
• URSA 2027 Engineering international studentship
• Bath current doctoral application guide
• Bath doctoral English rules
• Bath Chinese research-degree qualification route
• Bath Engineering research tuition 2027/28
• Bath postgraduate budget 2025/26
• UK Student visa route
• UK immigration health surcharge
• ATAS nationality and covered subject rules