[Deep Research × Zotero] Efficiently Collecting Source PDFs and Managing References for NotebookLM

Introduction

What do you do when you have a university report assignment or when you want to learn about an unfamiliar specialized field in a short period for work? You probably want to ask a Deep Research tool like Google Gemini to "research the latest trends in [topic]," understand the overview, and then use NotebookLM to create an AI specialized in that unfamiliar field. It's very useful because it creates audio overviews and flashcards for memorization. However, gathering the collection of source PDFs is a bit tedious. To generate high-quality output (audio or tests) in NotebookLM, you want to feed it "primary information (the actual research paper PDFs)" rather than AI-generated summary text. But if you try to do this without a plan:

1. Click the reference links in the Deep Research report
2. Go to the publisher's site, sometimes through university authentication, and download the PDF
3. Upload to NotebookLM
4. Repeat this process

Doing this for dozens of documents is quite a hassle. While you can perform Deep Research directly from NotebookLM, it feels like Gemini Pro or ChatGPT produces better reports when used for Deep Research.

What you can do

By using Zotero as a bulk PDF download tool, you can collect source PDFs for NotebookLM all at once.

1. Deep Research: Have the prompt output a "DOI list."
2. Zotero: Register DOIs in bulk and fetch available PDFs all at once.
3. Local Folder: Move PDFs in bulk from Zotero.
4. NotebookLM: Upload files in bulk from the local folder.

With just this, you can complete a specialized AI based on primary information (Full PDFs). Additionally, your reference management is also complete. Furthermore, the advantage of using Zotero isn't just about obtaining PDFs. The moment you register DOIs in Zotero, citation information in BibTeX (or biblatex) format is automatically generated along with the literature metadata. Therefore, immediately after understanding the paper content with NotebookLM, you can load the .bib file exported from Zotero into your LaTeX document and use \\cite{} to cite it instantly within the text.

Actual Workflow

1. Output a "DOI List" with Deep Research

Perform Deep Research with a prompt like this. I use Gemini because it can be used with the same account as NotebookLM.

Research [topic]. Please investigate as widely and deeply as possible, from historical background to the latest research.
Please obtain information from academic papers as much as possible.

In addition to adding reference links to the end of the page, please generate a list of DOIs according to the following rules:
1. **Output ONLY the DOI (Digital Object Identifier).**
2. **No** additional information such as paper title, author names, or abstracts is required.
3. **Never** include bullet point symbols (〃, *, -) or numbers (1., 2.).
4. Do not put it in a Markdown code block; output it as **plain text**.
5. Use line breaks so it is **purely one ID/URL per line**.

Output example:
10.1038/s41586-023-00000-x
10.1126/science.ade0000
https://arxiv.org/abs/2301.00000
10.1073/pnas.2210000120

Success is when DOIs are listed at the end of the generated report, just like the output example. Copy them all together.

2. Bulk Acquire PDFs and Literature Information from Zotero

Create a new library in Zotero.
Click Add Item(s) by Identifier in the Zotero toolbar (the icon that looks like a 🪄). Paste the DOI list you just copied (line-separated is fine) directly into the input field. Press Enter, and the literature metadata will be automatically registered in the library all at once, and PDFs will also be automatically added (if they are publicly available).

3. Select All PDFs

Search for PDF in the All Fields & Tags search bar at the top of the screen to expand the attached PDF files. Click any one PDF file and select all (Ctrl + A/Cmd + A); the PDF files will be selected as shown below.

4. Download to a Local Folder

Download the selected PDF files to an appropriate local folder and upload them to NotebookLM to complete the process. It seems that you cannot upload items selected in Zotero directly to NotebookLM. If anyone knows a way, I would appreciate it if you could let me know.

Summary and Thoughts

By going through Zotero, you can quickly obtain sources for NotebookLM while also acquiring the metadata for those documents, which I believe is useful for researchers.
NotebookLM's standalone Deep Research strongly supports the "reading" process, but by involving Zotero, the entire research process of "reading, thinking, and writing" is integrated into a single workflow. The natural connection between AI-driven understanding and LaTeX-based writing and citation management is a major advantage of this workflow. Thank you for reading to the end.