IISC Current Affairs

IISc researchers develop low-cost, sensitive CO sensor

Indian Institute of Science (IISc) researchers from Bengaluru have developed a highly sensitive, low cost nanometre-scale carbon monoxide (CO) sensor, with potential applications in environmental pollution monitoring.

The sensor was developed using novel fabrication technique that does not involve costly and time consuming lithography technology.

Carbon Monoxide (CO)

CO is a colorless, odorless gas. It is harmful when inhaled in large amounts The greatest source of CO is internal combustions (IC) engines of cars, trucks and other vehicles or machinery that burn fossil fuels. Breathing high concentration of CO reduces the amount of oxygen that can be transported in the blood stream to critical organs like the heart and brain.

Key Facts

The nanometer-sized sensor was made using zinc-oxide (ZnO) nanostructure on a silicon wafer substrate. Tiny polystyrene beads were also used on the wafer. These beads were first added on the on the oxidised silicon wafer arrange themselves into what is called a hexagonal close-packed structure.

Reasonable level of vacuum is maintained between the wafer and beads. When a high voltage is applied, it etches away the surfaces of the beads until a gap of desired thickness is formed between adjacent beads. Then ZnO is deposited on the system. This occupies the spaces between the beads, forming a honeycomb like nano-mesh that can function as a nanosenor.

Significance

The nanometre-scale CO sensor is able to detect a difference in CO level as low as 500 parts per billion (ppb). It can selectively respond to CO even in the presence of other gases. It also significantly cuts down the time and cost involved in making nanostructured gas sensors.

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IISc ranked India’s top university in 2017 NIRF Survey

The Indian Institute of Sciences (IISc), Bengaluru was adjudged as the best Indian university in the 2017 National Institutional Ranking Framework (NIRF) released by Union Human Resource Development Ministry.

This year it is second edition NIRF survey and was released as part of the India Rankings 2017 for the Educational Institutions.

What is NIRF Survey?

NIRF survey is first of its kind of indigenous ranking framework for higher education institutions in the country. It outlines a methodology to rank institutions across the country based on the parameters broadly covering Teaching, Learning and Resources, Research and Professional practices, Graduation Outcomes, Outreach and inclusivity and Perception. It covers six categories of institutions including universities, engineering, management, pharmacy, architecture and colleges.

Background

In the second edition of India Rankings, a total of 2995 institutions had participated. It included 232 Universities, 1024 Engineering Institutions, 546 Management Institutions, 318 Pharmacy Institutions and 637 General Degree Colleges, and others. Many of these had participated in multiple disciplines, adding to a total of 3319 participants across disciplines.

List of top 5 India Rankings 2017

Overall
  • Indian Institute of Science, Banglore.
  • Indian Institute of Technology, Madras.
  • Indian Institute of Technology, Bombay.
  • Indian Institute of Technology, Kharagpur
  • Indian Institute of Technology, New Delhi
Engineering
  • Indian Institute of Technology, Madras
  • Indian Institute of Technology, Bombay
  • Indian Institute of Technology, Kharagpur
  • Indian Institute of Tchnology, New Delhi
  • Indian Institute of Technology, Kanpur
Management
  • Indian Institute of Management, Ahmedabad
  • Indian Institute of Management, Banglore
  • Indian Institute of Management, Calcutta
  • Indian Institute of Management, Lucknow
  • Indian Institute of Management, Kozhikode
University
  • Indian Institute of Science, Banglore
  • Jawaharlal Nehru University, New Delhi
  • Banaras Hindu University
  • Jawaharlal Nehru Centre for Advanced Scientific Research, Banglore
  • Jadavpur University, Kolkata, West Bengal
Colleges
  • Miranda House, Delhi
  • Loyola College, District Chennai
  • Shri Ram College of Commerce, New Delhi
  • Bishop Heber College, District Tiruchirapalli
  • Atma Ram Sanatan Dharma College,New Delhi
Pharmacy
  • Jamia Hamdard, New Delhi
  • National Institute of Pharmaceutical Education and Research, Mohali, S.A.S. Nagar (Mohali), Punjab
  • University Institute of Pharmaceutical Sciences, Chandigarh
  • Indian Institute of Chemical Technology, Mumbai
  • National Institute of Pharmaceutical Education and Research, Hyderabad

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