Au/Jelatin:Ag NP/p-Si/Al Hibrit Biyo-Nanokompozit Fotodiyotun Geliştirilmiş Foto tepkisi ve Antibakteriyel Performansı

Ali Rıza Deniz; Gökhan Gök

doi:10.57244/dfbd.1943013

TR EN

Au/Jelatin:Ag NP/p-Si/Al Hibrit Biyo-Nanokompozit Fotodiyotun Geliştirilmiş Foto tepkisi ve Antibakteriyel Performansı

Abstract

Bu çalışmada, çevre dostu ve çok fonksiyonlu bir fotodedektör yapısı olarak Au/Gelatin:Ag NP/p-Si/Al hibrit biyo-nanokompozit fotodiyot başarıyla üretilmiş ve yapısal, optik, elektriksel ve antibakteriyel özellikleri ayrıntılı olarak incelenmiştir. Ara tabaka olarak kullanılan Gelatin:Ag NP nanokompoziti, doğal jelatinin biyouyumluluğu ve film oluşturma kabiliyeti ile Ag nanopartiküllerin yüksek iletkenlik ve plazmonik özelliklerini bir araya getirmektedir. SEM analizleri Ag nanopartiküllerin jelatin matrisi içerisinde homojen dağıldığını ve ortalama parçacık boyutunun nano ölçekli aralıkta olduğunu göstermiştir. XRD sonuçları, amorf jelatin fazı içerisinde yüzey merkezli kübik yapıya sahip kristalin Ag nanopartiküllerin başarılı şekilde oluştuğunu doğrulamıştır. UV–Vis analizlerinde yaklaşık 410 nm civarında gözlenen yüzey plazmon rezonans bandı Ag nanopartiküllerin varlığını desteklerken, optik bant aralığı 3.21 eV olarak hesaplanmıştır. Fotodiyotun akım-gerilim karakteristikleri, yapının tüm ölçüm koşullarında belirgin doğrultucu davranış sergilediğini göstermiştir. Aydınlatma şiddeti arttıkça ters besleme bölgesindeki fotoakım önemli ölçüde artmış, bu durum cihazın etkin ışık algılama kapasitesini ortaya koymuştur. Termiyonik emisyon modeli ile idealite faktörü ve bariyer yüksekliği, Cheung fonksiyonları ile seri direnç değerleri hesaplanmıştır. İdealite faktörü 1.17’den 3.05’e yükselirken, bariyer yüksekliği 0.87 eV’den 0.62 eV’e düşmüştür. Ayrıca cihaz, yüksek fotoakım, artan duyarlılık ve 1013 Jones mertebesinde özgül dedektiflik değeri sergilemiştir. α=0.97, β=0.42 ve γ=0.36 değerleri, cihazın ışık şiddetine karşı kararlı ve güvenilir tepki verdiğini göstermektedir. Antibakteriyel testlerde, yapı hem Escherichia coli hem de Staphylococcus aureus bakterilerine karşı etkili inhibisyon göstermiştir. En yüksek antibakteriyel etkinlik 365 nm UV ışık altında elde edilmiş, görünür ışık altında da karanlık ortama kıyasla belirgin artış gözlenmiştir. Bu sonuçlar, Ag nanopartiküllerin iyon salınımı, reaktif oksijen türleri oluşumu ve plazmonik fotoaktivasyon mekanizmaları ile açıklanmıştır. Sonuç olarak, Au/Gelatin:Ag NP/p-Si/Al yapısı; yüksek fotodedektör performansı, düşük maliyetli üretim, biyouyumluluk ve ışık destekli antibakteriyel aktivite özelliklerini aynı anda sunan umut verici yeni nesil çok fonksiyonlu bir optoelektronik aygıttır.

Keywords

Fotodiyot, I-V, Fotoduyarlılık, Dedektiflik, Jelatin:Ag NP

Supporting Institution

Hakkari Üniversitesi

Project Number

Hakkari Üniversitesi Bilimsel Araştırma Projeleri Bütçesi No: FM26BAP1

Ethical Statement

Bu çalışma insan katılımcılar, insan verileri veya hayvan deneyleri içermemektedir. Bu nedenle etik kurul onayı gerekmemiştir. Tüm deneysel işlemler, malzeme bilimi araştırmaları için geçerli kurumsal ve uluslararası bilimsel etik ilkelerine uygun olarak gerçekleştirilmiştir. Tüm yazarlar makalenin son halini incelemiş, onaylamış ve yayına gönderilmesini kabul etmiştir. Yazarlar bu çalışma ile ilgili herhangi bir etik ihlal bulunmadığını beyan eder.

Thanks

Bu çalışmanın diyot üretim aşaması, Hakkari Üniversitesi Bilimsel Araştırma Projeleri Koordinasyon Birimi tarafından FM26BAP1 numaralı proje kapsamında desteklenmiştir. Yazarlar sağlanan finansal destek için teşekkür eder.

Enhanced Photoresponse and Antibacterial Performance of Au/Gelatin:Ag NP/p-Si/Al Hybrid Bio-Nanocomposite Photodiode

Abstract

In this study, an environmentally friendly and multifunctional Au/Gelatin:Ag NP/p-Si/Al hybrid bio-nanocomposite photodiode was successfully fabricated and its structural, optical, electrical, and antibacterial properties were comprehensively investigated. The Gelatin:Ag NP interfacial layer combines the biocompatibility and film-forming capability of natural gelatin with the high conductivity and plasmonic properties of silver nanoparticles. SEM analyses revealed that Ag nanoparticles were homogeneously distributed within the gelatin matrix with nanoscale particle dimensions. XRD results confirmed the successful formation of crystalline face-centered cubic Ag nanoparticles embedded in the amorphous gelatin framework. UV–Vis measurements exhibited a characteristic localized surface plasmon resonance band around 410 nm, while the optical band gap of the nanocomposite was determined as 3.21 eV. Current–voltage measurements demonstrated pronounced rectifying behavior under all measurement conditions, confirming the successful formation of a Schottky junction. With increasing illumination intensity, the reverse-bias photocurrent significantly increased, indicating efficient photodetection capability. The ideality factor and barrier height were extracted using thermionic emission theory, whereas the series resistance values were obtained from Cheung functions. The ideality factor increased from 1.17 to 3.05, while the barrier height decreased from 0.87 eV to 0.62 eV under increasing illumination. In addition, the device exhibited high photocurrent, enhanced responsivity, and specific detectivity values reaching the order of 1013 Jones. The obtained α=0.97, β=0.42, and γ=0.36 values confirmed stable and reliable power-dependent photoresponse behavior. Antibacterial tests showed that the fabricated device effectively inhibited both Escherichia coli and Staphylococcus aureus strains. The strongest antibacterial activity was achieved under 365 nm UV illumination, while visible-light exposure also provided enhanced activity compared with the dark condition. These results were attributed to Ag⁺ ion release, reactive oxygen species generation, and plasmon-assisted photoactivation processes. Overall, the Au/Gelatin:Ag NP/p-Si/Al structure offers a promising next-generation multifunctional optoelectronic platform combining high photodetector performance, low-cost fabrication, biocompatibility, and light-enhanced antibacterial functionality.

Keywords

Photodiode, I-V, Photosensitivity, Detectivity, Gelatin:Ag NP

Supporting Institution

Hakkari University

Project Number

Hakkari Üniversitesi Bilimsel Araştırma Projeleri Bütçesi No: FM26BAP1

Ethical Statement

The authors declare that this manuscript is original, has not been published previously, and is not under consideration for publication elsewhere. All authors have read and approved the final version of the manuscript and agree with its submission. The study did not involve human participants, human data, animal experiments, or clinical procedures; therefore, formal ethical committee approval was not required. All experimental procedures were conducted in accordance with relevant institutional and international standards for materials research. The authors confirm that there are no known ethical issues associated with this work.

Thanks

The diode fabrication part of this study was financially supported by the Scientific Research Projects Coordination Unit of Hakkari University under Project No. FM26BAP1. The authors gratefully acknowledge this support.

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Details

Primary Language

Turkish

Subjects

Electrical Energy Generation (Incl. Renewables, Excl. Photovoltaics)

Journal Section

Research Article

Authors

Ali Rıza Deniz ^*
Türkiye

Gökhan Gök
Türkiye

Publication Date

July 22, 2026

Submission Date

May 3, 2026

Acceptance Date

July 16, 2026

Published in Issue

Year 2026 Volume: 9 Number: 1

DOI

https://doi.org/10.57244/dfbd.1943013

IZ

https://izlik.org/JA83UN42BT

APA

Deniz, A. R., & Gök, G. (2026). Au/Jelatin:Ag NP/p-Si/Al Hibrit Biyo-Nanokompozit Fotodiyotun Geliştirilmiş Foto tepkisi ve Antibakteriyel Performansı. Doğu Fen Bilimleri Dergisi, 9(1), 19-38. https://doi.org/10.57244/dfbd.1943013

AMA

1.Deniz AR, Gök G. Au/Jelatin:Ag NP/p-Si/Al Hibrit Biyo-Nanokompozit Fotodiyotun Geliştirilmiş Foto tepkisi ve Antibakteriyel Performansı. Doğu Fen Bilimleri Dergisi. 2026;9(1):19-38. doi:10.57244/dfbd.1943013

Chicago

Deniz, Ali Rıza, and Gökhan Gök. 2026. “Au/Jelatin:Ag/NP/P-Si/Al/Hibrit/Biyo-Nanokompozit/Fotodiyotun/Geliştirilmiş/Foto/Tepkisi/Ve/Antibakteriyel/Performansı”. Doğu Fen Bilimleri Dergisi 9 (1): 19-38. https://doi.org/10.57244/dfbd.1943013.

EndNote

Deniz AR, Gök G (July 1, 2026) Au/Jelatin:Ag NP/p-Si/Al Hibrit Biyo-Nanokompozit Fotodiyotun Geliştirilmiş Foto tepkisi ve Antibakteriyel Performansı. Doğu Fen Bilimleri Dergisi 9 1 19–38.

IEEE

[1]A. R. Deniz and G. Gök, “Au/Jelatin:Ag NP/p-Si/Al Hibrit Biyo-Nanokompozit Fotodiyotun Geliştirilmiş Foto tepkisi ve Antibakteriyel Performansı”, Doğu Fen Bilimleri Dergisi, vol. 9, no. 1, pp. 19–38, July 2026, doi: 10.57244/dfbd.1943013.

ISNAD

Deniz, Ali Rıza - Gök, Gökhan. “Au/Jelatin:Ag/NP/P-Si/Al/Hibrit/Biyo-Nanokompozit/Fotodiyotun/Geliştirilmiş/Foto/Tepkisi/Ve/Antibakteriyel/Performansı”. Doğu Fen Bilimleri Dergisi 9/1 (July 1, 2026): 19-38. https://doi.org/10.57244/dfbd.1943013.

JAMA

1.Deniz AR, Gök G. Au/Jelatin:Ag NP/p-Si/Al Hibrit Biyo-Nanokompozit Fotodiyotun Geliştirilmiş Foto tepkisi ve Antibakteriyel Performansı. Doğu Fen Bilimleri Dergisi. 2026;9:19–38.

MLA

Deniz, Ali Rıza, and Gökhan Gök. “Au/Jelatin:Ag/NP/P-Si/Al/Hibrit/Biyo-Nanokompozit/Fotodiyotun/Geliştirilmiş/Foto/Tepkisi/Ve/Antibakteriyel/Performansı”. Doğu Fen Bilimleri Dergisi, vol. 9, no. 1, July 2026, pp. 19-38, doi:10.57244/dfbd.1943013.

Vancouver

1.Ali Rıza Deniz, Gökhan Gök. Au/Jelatin:Ag NP/p-Si/Al Hibrit Biyo-Nanokompozit Fotodiyotun Geliştirilmiş Foto tepkisi ve Antibakteriyel Performansı. Doğu Fen Bilimleri Dergisi. 2026 Jul. 1;9(1):19-38. doi:10.57244/dfbd.1943013

Au/Jelatin:Ag NP/p-Si/Al Hibrit Biyo-Nanokompozit Fotodiyotun Geliştirilmiş Foto tepkisi ve Antibakteriyel Performansı

Abstract

Keywords

Supporting Institution

Project Number

Ethical Statement

Thanks

Enhanced Photoresponse and Antibacterial Performance of Au/Gelatin:Ag NP/p-Si/Al Hybrid Bio-Nanocomposite Photodiode

Abstract

Keywords

Supporting Institution

Project Number

Ethical Statement

Thanks

References

Details

Primary Language

Subjects

Journal Section

Authors

Publication Date

Submission Date

Acceptance Date

Published in Issue

DOI

IZ

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